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Journal articles on the topic 'AF magnetic order'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Syshchenko, O., T. Fujita, K. Prokeš, V. Sechovský, and A. A. Menovsky. "Collapse of AF magnetic order in UNiAl under pressure." Physica B: Condensed Matter 281-282 (June 2000): 208–9. http://dx.doi.org/10.1016/s0921-4526(99)00816-9.

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2

Tyulkina, Irina V., Denis S. Goldobin, Lyudmila S. Klimenko, Igor S. Poperechny, and Yuriy L. Raikher. "Collective in-plane magnetization in a two-dimensional XY macrospin system within the framework of generalized Ott–Antonsen theory." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, no. 2171 (2020): 20190259. http://dx.doi.org/10.1098/rsta.2019.0259.

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The problem of magnetic transitions between the low-temperature (macrospin ordered) phases in two-dimensional XY arrays is addressed. The system is modelled as a plane structure of identical single-domain particles arranged in a square lattice and coupled by the magnetic dipole–dipole interaction; all the particles possess a strong easy-plane magnetic anisotropy. The basic state of the system in the considered temperature range is an antiferromagnetic (AF) stripe structure, where the macrospins (particle magnetic moments) are still involved in thermofluctuational motion: the superparamagnetic

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3

Nocerino, Elisabetta, Ola K. Forslund, Chennan Wang, et al. "Magnetic nature of wolframite MgReO₄." Journal of Physics: Conference Series 2462, no. 1 (2023): 012037. http://dx.doi.org/10.1088/1742-6596/2462/1/012037.

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Abstract Rhenium oxides belonging to the family AReO4 where A is a metal cation, exhibit interesting electronic and magnetic properties. In this study we have utilized the muon spin rotation/relaxation (µ +SR) technique to study the magnetic properties of the MgReO4 compound. To the best of our knowledge, this is the first investigation reported on this interesting material, that is stabilized in a wolframite crystal structure using a special high-pressure synthesis technique. Bulk magnetic studies show the onset of an antiferromagnetic (AF) long range order, or a possible singlet spin state a

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4

TIWARI, RAJARSHI, and PINAKI MAJUMDAR. "NONCOLLINEAR MAGNETIC ORDER IN THE DOUBLE PEROVSKITES: DOUBLE EXCHANGE ON A GEOMETRICALLY FRUSTRATED LATTICE." International Journal of Modern Physics B 27, no. 06 (2013): 1350018. http://dx.doi.org/10.1142/s0217979213500185.

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Double perovskites (DPs) of the form A 2 BB ′ O 6 usually involve a transition metal ion, B, with a large magnetic moment, and a nonmagnetic ion B ′. While many DPs are ferromagnetic, studies on the underlying model reveal the possibility of antiferromagnetic (AF) phases as well driven by electron delocalization. In this paper we present a comprehensive study of the magnetic ground state and Tc scales of the minimal DP model in three dimensions using a combination of spin-fermion Monte Carlo and variational calculations. The effective magnetic lattice in three dimensions is face centered cubic

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5

Chirkova, A. M., A. S. Volegov, D. S. Neznakhin, E. A. Stepanova, and N. V. Baranov. "Pressure Induced AF - F - AF Magnetic Phase Transformations in Pd Substituted FeRh Compound." Solid State Phenomena 190 (June 2012): 299–302. http://dx.doi.org/10.4028/www.scientific.net/ssp.190.299.

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At ambient pressure, the Fe0.49(Rh1-xPdx)0.51 alloys with the Pd concentration within 0 < x < 0.12 exhibit an antiferromagnetic (AF) state below the critical temperature Tt, while above x = 0.12 the alloys have a ferromagnetic (F) order up to the Curie temperature TC 650 K. The temperature and field dependences of the magnetization in the alloys with x = 0.08; 0.13 were investigated under hydrostatic pressure up to 10 kbar. The application of pressure of about 8.5 kbar is observed to induce the F-AF phase transition in the ferromagnetically ordered compound with x = 0.13. The AF-F-AF pha

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6

SPEZZANI, CARLO, PIERO TORELLI, MAURIZIO SACCHI, et al. "MAGNETIC COUPLING IN Co/Cu MULTILAYERS: FIELD-DEPENDENT ANTIFERROMAGNETIC ORDERING INVESTIGATED BY RESONANT X-RAY SCATTERING." Surface Review and Letters 09, no. 02 (2002): 921–24. http://dx.doi.org/10.1142/s0218625x02003214.

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By simultaneous measurements of sample resistance and of X-ray resonant scattering, we tried to establish a direct correlation between magnetoresistance (MR) and antiferromagnetic (AF) order in a Co/Cu metallic multilayer. Field-dependent scattered intensity has been measured in a geometrical configuration corresponding to the Bragg peak coming from the AF coupling, at a photon energy close to the Co L 3 absorption edge (hν = 776.5 eV ). The comparison between measurements of the scattered intensity and of the resistance clearly shows a direct correlation between AF order and MR.

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7

Grimes, M., N. Gurung, H. Ueda, et al. "X-ray investigation of long-range antiferromagnetic ordering in FeRh." AIP Advances 12, no. 3 (2022): 035048. http://dx.doi.org/10.1063/9.0000320.

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We demonstrate a probe of long-range antiferromagnetic (AF) order in FeRh thin films using non-resonant magnetic x-ray scattering. In particular, x-rays at energies below the Fe K-edge have been used for the observation of magnetic Bragg peaks. Due to the low efficiency of the magnetic scattering, a grazing incidence geometry was used to optimise the diffracted intensity from the thin film samples. Based on Scherrer analysis, we estimate a coherence length similar to previous reports from x-ray magnetic linear dichroism (XMLD) experiments, indicating that domain sizes are limited to 40 nm whic

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8

Abulikemu, Aierxiding, Shenghan Gao, Toshiyuki Matsunaga, et al. "Partial cation disorder in Li₂MnO₃ obtained by high-pressure synthesis." Applied Physics Letters 120, no. 18 (2022): 182404. http://dx.doi.org/10.1063/5.0088023.

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While atomic disorder has provided a paradigm shift in crystalline materials because of unusual atomic arrangements and functional response, “partial” disorder is scarcely reported until now. We discovered partial cation disorder in Li2MnO3 with fewer stacking faults, which was synthesized under high pressure. Mn and Li atoms in a Mn2/3Li1/3O2 layer disorder while Li atoms in a Li layer order. Magnetization and specific heat measurements indicate a long-range antiferromagnetic (AF) order below 35 K. The irreversibility observed in the magnetization data and the hump observed for the specific h

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9

Chechenin, Nikolay G., Irina O. Dzhun, Georgy V. Babaytsev, Mikhail G. Kozin, Alexey V. Makunin, and Irina L. Romashkina. "FMR Damping in Thin Films with Exchange Bias." Magnetochemistry 7, no. 5 (2021): 70. http://dx.doi.org/10.3390/magnetochemistry7050070.

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Ferromagnetic resonance (FMR) linewidth (LW) is a tool for studying the high frequency properties of magnetic materials for their application in high-speed devices. Here, we investigate different mechanisms which determine FMR damping in bilayer ferromagnetic/antiferromagnetic (F/AF and AF/F) exchange bias systems. Variations of FMR LW with the thickness and deposition order of the F and AF layers were studied, as well as their correlation with the exchange bias field and roughness of the sample surface. We observed much larger LW in AF/F structures compared with F/AF samples. It was found tha

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10

Arnhold, S., S. Glüer, K. Hartmann, et al. "Amniotic-Fluid Stem Cells: Growth Dynamics and Differentiation Potential after a CD-117-Based Selection Procedure." Stem Cells International 2011 (2011): 1–12. http://dx.doi.org/10.4061/2011/715341.

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Amniotic fluid (AF) has become an interesting source of fetal stem cells. However, AF contains heterogeneous and multiple, partially differentiated cell types. After isolation from the amniotic fluid, cells were characterized regarding their morphology and growth dynamics. They were sorted by magnetic associated cell sorting using the surface marker CD 117. In order to show stem cell characteristics such as pluripotency and to evaluate a possible therapeutic application of these cells, AF fluid-derived stem cells were differentiated along the adipogenic, osteogenic, and chondrogenic as well as

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11

Sera, Masafumi, and Shinichirou Kobayashi. "Magnetic Properties of the 4 Sublattice Model for the Antiferro (AF) Quadrupolar Order Dominated by the AF Octupolar and AF Exchange Interactions –A Simple Model for CeB6–." Journal of the Physical Society of Japan 68, no. 5 (1999): 1664–78. http://dx.doi.org/10.1143/jpsj.68.1664.

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12

Zhang, Lei, Tian Ai, Xiaoxi Tian, et al. "Microwave-assisted preparation of Ag/Fe magnetic biochar from clivia leaves for adsorbing daptomycin antibiotics." Open Chemistry 20, no. 1 (2022): 388–400. http://dx.doi.org/10.1515/chem-2022-0156.

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Abstract Novel clivia biochar adsorbing daptomycin (DAP) was prepared by microwave digestion–anaerobic carbonization in this work. Fe/Ag submicron particles were introduced to the biochar surface based on the reducibility of biochar to enhance its adsorption capacity. Characterization confirmed that modified biochar (AF-biochar) had a higher particle size (126 μm), larger specific surface area (521.692 m2 g−1), richer pore structure, and higher thermal stability. The effects of the main variables (e.g., the solution pH, contact time, initial DAP concentration, and temperature) were investigate

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13

Oltean-Péter, Balázs, Szilamér Korodi, István Benedek, et al. "Imaging-derived Biomarkers Associated with Atrial FIBROsis, Structural Remodeling and the Risk of Cardioembolic Events in Patients with Atrial Fibrillation – the FIBROS Study." Journal of Interdisciplinary Medicine 2, s4 (2017): 31–35. http://dx.doi.org/10.1515/jim-2017-0095.

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AbstractRecent studies demonstrated that despite restoration of the sinus rhythm, patients with a positive history of atrial fibrillation (AF) are still at risk of thromboembolic events. The primary objective of this study is to identify new imaging-derived biomarkers provided by modern imaging technologies, such as cardiac computed tomography angiography, delayed enhancement magnetic resonance imaging, or speckle tracking echocardiography, as well as hematological biomarkers, associated with the risk of intracavitary thrombosis in patients with AF, in order to identify the imaging-derived cha

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14

Uba, J. I., A. J. Ekpunobi, and P. I. Ekwo. "A model of the response of GMR of metallic multilayers to external magnetic field." Materials Science-Poland 33, no. 4 (2015): 835–40. http://dx.doi.org/10.1515/msp-2015-0099.

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AbstractIt has not been possible to transform resistivity models in terms of magnetic field in order to account for variation of giant magnetoresistance (GMR) with external magnetic field, which would have led to determination of material properties. This problem is approached mathematically via variation calculus to arrive at an exponential function that fits observed GMR values. Using this model in free electron approximation, the mean Fermi vector, susceptibility and total density of states of a number of metallic multilayers are determined from their reported GMR values. Susceptibility is

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15

CHEN, YAN, Z. D. WANG, and C. S. TING. "NOVEL VORTEX STRIPE PHASE UNDER STRONG MAGNETIC FIELD IN HIGH TEMPERATURE SUPERCONDUCTORS." International Journal of Modern Physics B 19, no. 01n03 (2005): 9–12. http://dx.doi.org/10.1142/s021797920502786x.

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The nature of vortex structure in the mixed state of high-temperature superconductors (HTS) is investigated by solving the Bogoliubov-de Gennes equations with consideration of competition between antiferromagnetic (AF) and d-wave superconductivity (DSC) orders. By varying the applied magnetic field and temperature, the geometry of vortex structure can take two different forms: conventional vortex lattice (triangular or square), or vortex stripe phases where all the order parameters including spin density wave, charge density wave and superconducting order exhibit stripe-like behavior. This nov

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16

Nasser, J. A., and A. Bettachy. "Interpretation of the magnetic field dependence of the first-order AF-HX phase transition in NiBr2." Journal of Physics: Condensed Matter 1, no. 48 (1989): 9561–70. http://dx.doi.org/10.1088/0953-8984/1/48/006.

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17

Hu, Xiao. "Magnetic-field-induced first-order N to AF transition: a prediction by the SO(5) theory." Physica C: Superconductivity 341-348 (November 2000): 239–40. http://dx.doi.org/10.1016/s0921-4534(00)00459-7.

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18

Aidona, E., D. Kondopoulou, M. Alexandrou, and N. Ioannidis. "ARCHAEOMAGNETIC STUDIES IN KILNS FROM N. GREECE." Bulletin of the Geological Society of Greece 43, no. 4 (2017): 1888. http://dx.doi.org/10.12681/bgsg.11380.

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Archaeomagnetism combines the magnetic properties of baked materials with Archaeology. The archaeomagnetic method can be applied to any kind of permanent - in situ or displaced- burnt structures, such as kilns, ovens, hearths, burnt floors, tiles, bricks and pottery fragments, the latter for intensity measurements only. In this study we present the latest archaeomagnetic results from archaeological sites which are distributed in N. Greece (Polymylos, Sani, Thesssaloniki). The Natural Remanent Magnetization (NRM) and the magnetic susceptibility of the samples have been initially measured. The s

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19

De Sensi, Francesco, Diego Penela, David Soto-Iglesias, Antonio Berruezo, and Ugo Limbruno. "Imaging Techniques for the Study of Fibrosis in Atrial Fibrillation Ablation: From Molecular Mechanisms to Therapeutical Perspectives." Journal of Clinical Medicine 10, no. 11 (2021): 2277. http://dx.doi.org/10.3390/jcm10112277.

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Atrial fibrillation (AF) is the most prevalent form of cardiac arrhythmia. It is often related to diverse pathological conditions affecting the atria and leading to remodeling processes including collagen accumulation, fatty infiltration, and amyloid deposition. All these events generate atrial fibrosis, which contribute to beget AF. In this scenario, cardiac imaging appears as a promising noninvasive tool for monitoring the presence and degree of LA fibrosis and remodeling. The aim of this review is to comprehensively examine the bench mechanisms of atrial fibrosis moving, then to describe th

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20

Li, Yanting, Bixia Gao, Qiyu Wang, Juan Zhang, and Qiaoni Chen. "Coexistence of Charge Order and Antiferromagnetic Order in an Extended Periodic Anderson Model." Chinese Physics Letters 38, no. 8 (2021): 087102. http://dx.doi.org/10.1088/0256-307x/38/8/087102.

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The competition between the RKKY interaction and the Kondo effect leads to a magnetic phase transition, which occurs ubiquitously in heavy fermion materials. However, there are more and more experimental evidences indicating that the valence fluctuation plays an essential role in the Ce- and Y-based compounds. We study an extended periodic Anderson model (EPAM) which includes the onsite Coulomb repulsion Ucf between the localized electrons and conduction electrons. By employing the density matrix embedding theory, we investigate the EPAM in the symmetric case at half filling. By fixing the ons

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21

Murtazaev, A. K., A. B. Babaev, and G. Y. Ataeva. "Critical properties of 2d disordered 3-state antiferromagnetic potts model ON TRIANGULAR LATTICE." EPJ Web of Conferences 185 (2018): 11001. http://dx.doi.org/10.1051/epjconf/201818511001.

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By introducing a small amount of non-magnetic impurities into an antiferromagnetic (AF) two-dimensional (2D) Potts model on a triangular lattice it is that the impurities in spin systems described by this model result in the change of a first order to a second-order phase transition. The systems with linear sizes L × L = N, L = 9-144 are considered. Investigations are performed using the standard Metropolis algorithm along with Monte-Carlo single-cluster Wolff algorithm. On the basis of the theory of finite-size scaling, critical exponents (CE) are calculated: the heat capacity α, the suscepti

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22

Perkins, Andy, Krishna Tunga, and Suresh Sitaraman. "Acceleration Factor to relate Thermal Cycles to Power Cycles for Ceramic Ball Grid Area Array Packages." Journal of Microelectronics and Electronic Packaging 3, no. 4 (2006): 177–93. http://dx.doi.org/10.4071/1551-4897-3.4.177.

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There is a need for a new Acceleration Factor (AF) that can relate Accelerated Thermal Cycle (ATC) fatigue life to Power Cycle (PC) fatigue life quickly and accurately in order to avoid over designing electronic packages for benign environments. An AF, such as the Norris-Landzberg AF, is only applicable when using it to predict fatigue life within the same environment, i.e. ATC to ATC or PC to PC. This work proposes an AF that takes into account the differences between ATC tests and PC tests for ceramic ball grid array (CBGA) packages by considering relevant design and environmental parameters

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23

Ortiz-Álvarez, Hugo Hernán, Francy Nelly Jiménez-García, Carolina Márquez-Narváez, José Dario Agudelo-Giraldo, and Elisabeth Restrepo-Parra. "The Influence of Pressure on the Formation of FM/AF Configurations in LSMO Films: A Monte Carlo Approach." Computation 8, no. 4 (2020): 93. http://dx.doi.org/10.3390/computation8040093.

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In this work, Monte Carlo simulations of magnetic properties of thin films, including the influence of an external pressure, are presented. These simulations were developed using a Hamiltonian composed by terms that represent the exchange interaction, dipolar interaction, Zeeman effect, monocrystalline anisotropy, and pressure influence. The term that represents the pressure influence on the magnetic properties was included, since for many applications, magnetic materials are a part of a multiferroic material together with a piezoelectric or a ferroelectric compound. Initially, the model was d

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24

Maurya, Arun Kumar, Md Tahir Hossain Sarder, and Amal Medhi. "Mott transition, magnetic and orbital orders in the ground state of the two-band Hubbard model using variational slave-spin mean field formalism." Journal of Physics: Condensed Matter 34, no. 5 (2021): 055602. http://dx.doi.org/10.1088/1361-648x/ac3452.

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Abstract We study the ground state phase diagram of the degenerate two-band Hubbard model at integer fillings as a function of onsite Hubbard interaction U and Hund’s exchange coupling J. We use a variational slave-spin mean field method which allows symmetry broken states to be studied within the computationally less intensive slave-spin mean field formalism. The results show that at half-filling, the ground state at smaller U is a Slater antiferromagnet with substantial local charge fluctuations. As U is increased, the antiferromagnetic (AF) state develops a Heisenberg behavior, finally unde

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25

Matsuno, Shunichi, Hideki Ushio, Yuji Suwa, and Hiroshi Kamimura. "V. Mechanism of Superconductivity." International Journal of Modern Physics B 11, no. 32 (1997): 3815–31. http://dx.doi.org/10.1142/s0217979297001957.

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A possibility of phonon-mediated interaction as a mechanism of high- T c superconductivity is discussed. Because of different spatial distribution of Bloch wave function for up-spin particle and down-spin particle in the present model, the effective pair interaction which is derived from electron–phonon interaction is shown to have significant momentum- transfer dependence that is quite different from ordinary phonon-mediated interaction. This characteristic of pair interaction together with the geometric feature of Fermi-surface derived in a previous paper III leads to a dx2-y2 symmetric gap

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26

PAOLONE, A., R. CANTELLI, F. CORDERO, M. CORTI, A. RIGAMONTI, and M. FERRETTI. "ANELASTIC SPECTROSCOPY AND NQR RELAXATION IN Sr-DOPEN La2CuO4 AROUND THE AF PERCOLATION THRESHOLD." International Journal of Modern Physics B 17, no. 04n06 (2003): 512–20. http://dx.doi.org/10.1142/s0217979203016169.

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Anelastic spectra and 139 La NQR relaxation measurements have been carried out in La 2 - x Sr x CuO 4 (LSCO) for x around the critical value xc = 0.02 separating the antiferromagnetic (AF) from the cluster spin glass (CSG) phase for T → 0. The anelastic spectra around 10 K show step-like features common to samples pertaining to both AF and CSG phases. In the light of recent neutron scattering measurements suggesting that the spin-glass phase of LSCO with x < xc corresponds to a microscopic phase separation between regions with x ~ 0 and x ~ 0.02, the rise of the elastic energy dissipation h

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27

Kohama, Yoshimitsu, Hajime Ishikawa, Akira Matsuo, Koichi Kindo, Nic Shannon, and Zenji Hiroi. "Possible observation of quantum spin-nematic phase in a frustrated magnet." Proceedings of the National Academy of Sciences 116, no. 22 (2019): 10686–90. http://dx.doi.org/10.1073/pnas.1821969116.

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Water freezes into ice in winter and evaporates into vapor in summer. Scientifically, the transformations between solid, liquid, and gas are called phase transitions and can be classified through the changes in symmetry which occur in each case. A fourth phase of matter was discovered late in the 19th century: the liquid crystal nematic, in which rod- or disk-shaped molecules align like the atoms in a solid, while continuing to flow like a liquid. Here we report thermodynamic evidence of a quantum analog of the classical nematic phase, the quantum spin nematic (SN). In an SN, the spins of a qu

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28

RADWAŃSKI, R. J., and J. J. M. FRANSE. "SPECIFIC HEAT OF UPd2Al3." International Journal of Modern Physics B 07, no. 01n03 (1993): 38–41. http://dx.doi.org/10.1142/s021797929300010x.

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Particularities in the specific heat of UPd 2 Al 3, a λ-type of peak with a maximum at 14.5 K and a Schottky-type of peak with a broad maximum at 55 K, has been attributed to the 5f-subsystem of the U atoms. The U-5f contribution has been found to be described surprisingly well within a single-ion Hamiltonian that includes the charge multipolar (CMP) interactions and the antiferromagnetic (AF) exchange interaction between the U 3+ ions. The AF exchange parameter and the full set of the CMP parameters associated with the hexagonal symmetry have been evaluated. The energy-level scheme (ELS) of t

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29

Kamimura, Hiroshi, Masaaki Araidai, Kunio Ishida, et al. "Elucidation of Spin-Correlations, Fermi Surface and Pseudogap in a Copper Oxide Superconductor." Condensed Matter 8, no. 2 (2023): 33. http://dx.doi.org/10.3390/condmat8020033.

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First-principles calculations for underdoped La2−xSrxCuO4 (LSCO) have revealed a Fermi surface consisting of spin-triplet (KS) particles at the antinodal Fermi-pockets and spin-singlet (SS) particles at the nodal Fermi-arcs in the presence of AF local order. By performing a unique method of calculating the electronic-spin state of overdoped LSCO and by measurement of the spin-correlation length by neutron inelastic scattering, the origin of the phase-diagram, including the pseudogap phase in the high temperature superconductor, Sr-doped copper-oxide LSCO, has been elucidated. We have theoretic

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30

Aidona, E., R. Scholger, and H. J. Mauritsch. "NEW TECHNIQUES FOR SAMPLING AND CONSOLIDATION OF SEDIMENTS: APPLICATION TO BURNT SOILS FROM AN ARCHAEOLOGICAL SITE IN AUSTRIA." Bulletin of the Geological Society of Greece 36, no. 3 (2004): 1129. http://dx.doi.org/10.12681/bgsg.16454.

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An archaeomagnetic study requires samples to be oriented very precisely prior to the removal from the site and to be transported safely since most of the times the collected samples are very soft and fragile. In this study we present new techniques for sampling and consolidation of sediments and unconsolidated soils, which are useful tools for palaeomagnetic and archaeomagnetic investigations. An application of the above techniques has been performed in burnt soils (roastbeds) in an archaeological site near Eisenerz (Austria), which used to be a cooper-smelting place in Bronze Age (around 1450

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31

Bekhouche, Ahlem, Safia Alleg, Karima Dadda, Benilde F. O. Costa, Asma Wederni, and Joan-Josep Suñol. "Ni50Mn37.5Sn12.5 Heusler Alloy: Influence of Co Addition on the Structure, Martensitic Transition, and Magnetic Properties." Magnetochemistry 10, no. 8 (2024): 59. http://dx.doi.org/10.3390/magnetochemistry10080059.

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The impact of Co-addition (x = 0, 2, 4, and 6 at. %) in the as-cast and annealed Ni50Mn37.5Sn12.5 Heusler alloy at 900 °C for 24 h on the microstructure, magnetic properties, and the martensitic transition was studied using X-ray diffraction (XRD), scanning electron microscopy, vibrating sample magnetometry, and differential scanning calorimetry. The crystal structure of as-cast samples consists of a 14M modulated martensite structure, a face-centered (FCC) γ phase, and a face-centered tetragonal (FCT) MnNi-type phase L10. The as-cast samples show a dendritic microstructure with different cont

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32

Srinivasan, A., and Sidananda Sarma. "Co-Ni-Ga Alloys with Room Temperature Ferromagnetic Martensite Phase." Advanced Materials Research 52 (June 2008): 95–101. http://dx.doi.org/10.4028/www.scientific.net/amr.52.95.

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Co-Ni-Ga and Co-Ni-Al alloys are expected to be good ferromagnetic shape memory alloys (FSMAs) owing to their higher ductility resulting from the presence of γ-phase precipitates and higher stability in preparation since they do not contain the highly volatile element Mn. Co-Ni- Ga alloys have a wide range of martensitic transformation and Curie temperatures. In order to explore the possibility of obtaining Co-Ni-Ga alloys with room temperature ferromagnetic martensitic phase, two series of compositions, viz., Co70-xNixGa30 (20 ≤ x ≤ 26) and CoxNi25Ga75-x (43 ≤ x ≤ 50) were taken up for invest

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33

Dmour, Bianca-Ana, Radu-Stefan Miftode, Dan Iliescu Halitchi, et al. "Latest Insights into Mechanisms behind Atrial Cardiomyopathy: It Is Not always about Ventricular Function." Diagnostics 11, no. 3 (2021): 449. http://dx.doi.org/10.3390/diagnostics11030449.

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Atrial cardiomyopathy (ACM) represents a constantly evolving concept, with increasing importance in contemporary research and clinical practice. A better understanding of the mechanisms involved in atrial remodeling and its clinical correlations especially with atrial fibrillation (AF) and other cardiometabolic comorbidities may induce a significant impact on the diagnosis, prognosis, and therapeutic approach of ACM-related comorbidities. Although initially described several decades ago, investigators have only recently highlighted that several renal, metabolic, and cardiovascular diseases are

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34

Kurbatova, O. V., S. V. Petrichuk, D. G. Kuptsova, et al. "Level of circulating cytokines in children with chronic liver diseases at different stages of fibrosis." Russian Journal of Immunology 28, no. 1 (2024): 135–44. https://doi.org/10.46235/1028-7221-16978-loc.

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Liver diseases cause about 2 million deaths per year worldwide, with cirrhosis accounting for 2.1% of this number. The cytokine and chemokine balance determines outcomes of immune response. Many cytokines are involved in progression and control of various liver diseases via regulation of cellular activity. Our aim was to assess the level of circulating cytokines and chemokines depending on the stage of fibrosis in children with chronic liver diseases. 51 children with chronic liver diseases were examined (32 children with autoimmune hepatitis, 12 children with Wilson’s disease, 5 children with

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Goetz, Christian, Patricia Martínez Díaz, Olaf Dössel, et al. "Discrepancy Between LGE-MRI and Electro-Anatomical Mapping for Regional Detection of Pathological Atrial Substrate." Current Directions in Biomedical Engineering 9, no. 1 (2023): 483–86. http://dx.doi.org/10.1515/cdbme-2023-1121.

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Abstract Atrial fibrillation (AF) is the most common sustained arrhythmia posing a significant burden to patients and leading to an increased risk of stroke and heart failure. Additional ablation of areas of arrhythmogenic substrate in the atrial body detected by either late gadolinium enhancement magnetic resonance imaging (LGE-MRI) or electroanatomical mapping (EAM) may increase the success rate of restoring and maintaining sinus rhythm compared to the standard treatment procedure of pulmonary vein isolation (PVI). To evaluate if LGE-MRI and EAM identify equivalent substrate as potential abl

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Masunaga, Sueli H., Vagner B. Barbeta, Fábio Abud, Milton S. Torikachvili, and Renato F. Jardim. "Phase Diagram Mapping out the Complex Magnetic Structure of Single Crystals of (Gd, Er)B4 Solid Solutions." Magnetism 4, no. 1 (2024): 24–34. http://dx.doi.org/10.3390/magnetism4010002.

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Measurements of specific heat and magnetization in single crystals were used to map out the magnetic phase diagram of Gd1−xErxB4 (x = 0.2 and 0.4) solid solutions along the c-axis. While GdB4 orders antiferromagnetically (AF) at 41.7 K, with the easy plane of magnetization oriented perpendicularly to the c-axis, ErB4 displays AF ordering below 15.4 K, with the easy axis along c. Therefore, in solid solutions, the competition between the different spin anisotropies, as well as frustration, lead to a complex spin configuration. These measurements reveal that a 40% substitution of Er for Gd is su

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Pouget, Jean-Paul. "Spin-Peierls, Spin-Ladder and Kondo Coupling in Weakly Localized Quasi-1D Molecular Systems: An Overview." Magnetochemistry 9, no. 2 (2023): 57. http://dx.doi.org/10.3390/magnetochemistry9020057.

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We review the magneto-structural properties of electron–electron correlated quasi-one- dimensional (1D) molecular organics. These weakly localized quarter-filled metallic-like systems with pronounced spin 1/2 antiferromagnetic (AF) interactions in stack direction exhibit a spin charge decoupling where magnetoelastic coupling picks up spin 1/2 to pair into S = 0 singlet dimers. This is well illustrated by the observation of a spin-Peierls (SP) instability in the (TMTTF)2X Fabre salts and related salts with the o-DMTTF donor. These instabilities are revealed by the formation of a pseudo-gap in t

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Chen, Lebing, Xiaokun Teng, Ding Hu, et al. "Thermal evolution of spin excitations in honeycomb Ising antiferromagnetic FePSe3." npj Quantum Materials 9, no. 1 (2024). http://dx.doi.org/10.1038/s41535-024-00651-5.

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AbstractWe use elastic and inelastic neutron scattering (INS) to study the antiferromagnetic (AF) phase transitions and spin excitations in the two-dimensional (2D) zig-zag antiferromagnet FePSe3. By determining the magnetic order parameter across the AF phase transition, we conclude that the AF phase transition in FePSe3 is first-order in nature. In addition, our INS measurements reveal that the spin waves in the AF ordered state have a large easy-axis magnetic anisotropy gap, consistent with an Ising Hamiltonian, and possible biquadratic magnetic exchange interactions. On warming across TN,

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Postiglione, William M., Jierui Liang, Nileena Nandakumaran, Lucca Figari, Adam A. Aczel, and Chris Leighton. "Direct neutron-diffraction-based measurement of magnetic order in brownmillerite SrCoO2.5 and La0.5Sr0.5CoO2.5 thin films." APL Materials 12, no. 4 (2024). http://dx.doi.org/10.1063/5.0196646.

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Epitaxial cobaltites have emerged as exemplary materials for electrochemical gating, in large part due to their topotactic perovskite (P) ↔ brownmillerite (BM) transformations. SrCoO3−δ, for example, can be cycled between metallic ferromagnetic P SrCoO3 and insulating BM SrCoO2.5, realizing exceptional modulation of electronic, thermal, and optical properties. It is often presumed that such cycling also generates ferromagnetic–antiferromagnetic (F-AF) modulation due to the G-type AF order in bulk SrCoO2.5. Little is understood about magnetism in thin-film BM SrCoO2.5, however, meaning that the

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40

Houmes, Maurits J. A., Gabriele Baglioni, Makars Šiškins, et al. "Magnetic order in 2D antiferromagnets revealed by spontaneous anisotropic magnetostriction." Nature Communications 14, no. 1 (2023). http://dx.doi.org/10.1038/s41467-023-44180-4.

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AbstractThe temperature dependent order parameter provides important information on the nature of magnetism. Using traditional methods to study this parameter in two-dimensional (2D) magnets remains difficult, however, particularly for insulating antiferromagnetic (AF) compounds. Here, we show that its temperature dependence in AF MPS3 (M(II) = Fe, Co, Ni) can be probed via the anisotropy in the resonance frequency of rectangular membranes, mediated by a combination of anisotropic magnetostriction and spontaneous staggered magnetization. Density functional calculations followed by a derived or

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Chen, Fujia, Ning Han, Songyang Pu, et al. "Photonic antiferromagnetic topological insulator with a single surface Dirac cone." Science Advances 11, no. 22 (2025). https://doi.org/10.1126/sciadv.adu6230.

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Antiferromagnetism, characterized by alternating magnetic moments, has garnered renewed interest for its potential applications in spintronics and axion electrodynamics. Its synergy with topology may yield an exotic topological phase unique to a certain magnetic order, termed antiferromagnetic topological insulators (AF TIs). A hallmark signature of AF TIs is the presence of a single surface Dirac cone—a feature typically associated with strong three-dimensional (3D) topological insulators but lacking direct observation. Here, we theoretically and experimentally discover a 3D photonic AF TI pr

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Chen, Shaohai, Bee Chun Lim, Dennis J. X. Lin, et al. "Tailoring Antiferromagnetic Orders and Spin Transport in Noncollinear Mn₃Pt Multilayers." Advanced Functional Materials, June 19, 2025. https://doi.org/10.1002/adfm.202507406.

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AbstractNoncollinear antiferromagnetic (NCAF) materials, such as Mn₃Pt, exhibit remarkable spin‐orbit and tunneling phenomena, positioning them as promising candidates for low‐power, stray‐field immune nanoelectronics. However, precise control of AF order and spin transport properties, and understanding of their physical mechanisms, remains challenging. In this work, the interplay between crystal structure, magnetic orders, and anomalous Hall effect (AHE) is established in single‐crystalline Mn₃Pt (001) synthesized from a [Mn/Pt]20 multilayers with tunable Mn layer thickness (tMn). Resonant el

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Nakagawa, Kurea, Tomoyuki Yokouchi, and Yuki Shiomi. "Reconfigurable single-material Peltier effect using magnetic-phase junctions." Scientific Reports 11, no. 1 (2021). http://dx.doi.org/10.1038/s41598-021-03754-2.

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AbstractPeltier effects, which produce a heat flux at the junction of two different materials, have been an important technology for heating and cooling by electrical means. Whereas Peltier devices have advantages such as cleanliness, silence, compactness, flexibility, reliability, and efficiency, relatively complicated modular structures are unavoidable, leading to a higher cost than that of commonly used refrigeration technology. Here, we provide a concept of a Peltier device composed of a single magnetic material exhibiting a first-order magnetic transition. Our concept is based on a contro

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Liu, Panpan, Mason L. Klemm, Long Tian, et al. "In-plane uniaxial pressure-induced out-of-plane antiferromagnetic moment and critical fluctuations in BaFe2As2." Nature Communications 11, no. 1 (2020). http://dx.doi.org/10.1038/s41467-020-19421-5.

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AbstractA small in-plane external uniaxial pressure has been widely used as an effective method to acquire single domain iron pnictide BaFe2As2, which exhibits twin-domains without uniaxial strain below the tetragonal-to-orthorhombic structural (nematic) transition temperature Ts. Although it is generally assumed that such a pressure will not affect the intrinsic electronic/magnetic properties of the system, it is known to enhance the antiferromagnetic (AF) ordering temperature TN ( < Ts) and create in-plane resistivity anisotropy above Ts. Here we use neutron polarization analysis to show

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Joshi, Rajeev, Suman Karmakar, Kranti Kumar, Mukul Gupta, and R. Rawat. "Room temperature giant magnetocaloric effect in Pd doped FeRh and the effect of martensitic transition." Journal of Applied Physics 133, no. 17 (2023). http://dx.doi.org/10.1063/5.0135364.

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FeRh 0.8 Pd 0.2 is known to exhibit near room-temperature first-order antiferromagnetic (AF)–ferromagnetic (FM) transition, typical of chemically ordered FeRh system. In addition, it is also reported to show martensitic transition at a lower temperature. In this work, the effect of sample history on transition temperature (Tt) and the magnetocaloric effect (MCE) have been studied. The experimentally determined MCE parameters across FM to AF transition induced either by isothermal magnetic field sweep or by temperature sweep showed a large isothermal change in entropy around room temperature, i

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Cheng, Rui-Jin, Xiao-Xun Li, Qing Wang, et al. "Suppression of stimulated Brillouin and Raman scattering using the alternately changing frequency laser and the transverse magnetic fields." Chinese Physics B, October 26, 2023. http://dx.doi.org/10.1088/1674-1056/ad0716.

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Abstract A novel scheme to suppress both stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS) by combining an alternately changing frequency laser and a transverse magnetic field is proposed. The alternating frequency (AF) laser allows the laser frequency to change discretely and alternately over time. The suppression of SBS is significant as long as the AF difference is greater than the linear growth rate of SBS or the alternating time of laser frequency is less than the linear growth time of SBS. However, the AF laser is ineffective to suppress SRS that usually has a m

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Meng, Jing, Xiaoyan Zhu, Zhang hui, et al. "Thickness dependence of chemical ordering and fourfold exchange anisotropy in FeRh/CoFe bilayers." New Journal of Physics, February 27, 2025. https://doi.org/10.1088/1367-2630/adbb12.

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Abstract Fourfold exchange anisotropy has recently been discovered in bilayers consisting of a ferromagnetic (FM) layer exchange-coupling with an epitaxial antiferromagnetic (AF) layer. The chemical ordering of the AF layer plays an important role in the interfacial exchange coupling of AF/FM bilayers. Herein, we studied the thickness dependence of the chemical ordering and fourfold exchange anisotropy of FeRh/CoFe bilayers before and after the AF-FM phase transition of FeRh. The chemical ordering parameter of FeRh obtained by X-ray diffraction increases with thickness due to the decrease in t

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Kawagoe, Takeshi, and Shigemasa Suga. "Antiferromagnetic domain formation and spin frustration induced by adjacent paired screw dislocations in 10 monolayer-thick Cr(001) films." Japanese Journal of Applied Physics, March 29, 2023. http://dx.doi.org/10.35848/1347-4065/acc8aa.

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Abstract We investigated the growth and surface morphology of 10 monolayer (ML)-thick Cr(001) films on clean Au(001) surfaces. High-quality epitaxial Cr(001) films with large atomically flat terraces and distinct surface states were successfully fabricated through the growth at 300 K and subsequent post-annealing at 520 K. At 300 K, spin-polarized STM images of both the topological and magnetic structures of this Cr film were obtained. The magnetic images exhibited the following features: (1) the layered antiferromagnetic (AF) order appeared in adjacent terraces and one ML-depth shallow holes

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49

Behnke, A., G. Becatti, A. Sperber, D. Wanke, and G. Herdrich. "Current density and Lorentz force measurements in the downstream plume of the 100 kW AF-MPD thruster SX3." Journal of Applied Physics 137, no. 22 (2025). https://doi.org/10.1063/5.0254076.

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Applied-field magnetoplasmadynamic thruster (AF-MPDT) is a type of spacecraft electric propulsion (EP) with input powers of up to several 100 kW, which uses an external magnetic field to accelerate a propellant and to generate thrust. They reach a high-thrust density for an EP and medium to high specific impulses (Isp), which enables their usage in interplanetary space missions and for space tugs, for example, to the Moon. At the Institute of Space Systems, the water-cooled 100 kW steady state AF-MPDT SX3 is investigated. Magnetic field measurements with a Hall-probe were performed for a wide

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Fukuzumi, Masafumi, Ryoichi Taniguchi, Seiji Komatsu, Fumihisa Ono, and Akihiro Iwase. "Modification of lattice structure and magnetic properties of Fe-Rh alloys by energetic electron irradiation." MRS Proceedings 792 (2003). http://dx.doi.org/10.1557/proc-792-r3.15.

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ABSTRACTIn order to modify the lattice structure and magnetic properties, we irradiate Fe-50at.%Rh alloys with 8 MeV electrons at room temperature. Effects of irradiation are investigated by using Superconducting QUantum Interference Device (SQUID) and X-Ray Diffractometer (XRD).Although the crystal structure is not changed by the irradiation and remains the B2 structure, the lattice parameter increases by about 0.1–0.3 % and the antiferromagnetic(AF)-ferromagnetic(FM) transition temperature decreases by 3–18 deg. with increasing the electron fluence. The present result shows that energetic el

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