Gotowe bibliografie tematyczne / Ferromagnetic-Antiferromagnetic-Nanocomposites

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  3. Streszczenia konferencji

Gotowa bibliografia na temat „Ferromagnetic-Antiferromagnetic-Nanocomposites”

Autor: Grafiati
Data publikacji: 7 września 2023

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Artykuły w czasopismach na temat "Ferromagnetic-Antiferromagnetic-Nanocomposites"

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Azab, A. A., S. I. El-Dek i S. Solyman. "Unusual features of ferromagnetic/antiferromagnetic nanocomposites". Journal of Alloys and Compounds 656 (styczeń 2016): 987–91. http://dx.doi.org/10.1016/j.jallcom.2015.10.048.

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Cai, Xin Le, Shan Dong Li, Mei Mei Liu, Jian Peng Wu, Yi Hu, Jie Qiu i Jian Hua Lin. "Magnetoresistance and Exchange Bias Effect of (Co2MnSi)1-X-(NiO)X Nanocomposites". Advanced Materials Research 399-401 (listopad 2011): 620–24. http://dx.doi.org/10.4028/www.scientific.net/amr.399-401.620.

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The (Co2MnSi)1-x-(NiO)x(x = 0.0, 0.1, 0.2, 0.3) nanocomposites were fabricated by mechanical alloying using Co2MnSi Heusler alloy and NiO nanoparticles. It is revealed that antiferromagnetic NiO nanocrystallines dramatically enhances the magnetoresistance of the nanocomposites more than 20 times larger than that of the NiO-free Co2MnSi alloys at 300 K. The Exchange bias effect of the nanocomposites suggests that the spin-dependent tunneling and scattering at the interfaces of ferromagnetic/antiferromagnetic are responsible for the enhancement of the magnetoresistance.
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Nogués, J., V. Langlais, J. Sort, S. Doppiu, S. Suriñach i M. D. Baró. "Magnetic Properties of Ni-NiO (Ferromagnetic–Antiferromagnetic) Nanocomposites Obtained from a Partial Mechanochemical Reduction of NiO". Journal of Nanoscience and Nanotechnology 8, nr 6 (1.06.2008): 2923–28. http://dx.doi.org/10.1166/jnn.2008.18319.

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The magnetic properties of ferromagnetic (FM)–antiferromagnetic (AFM), Ni-NiO, nanocomposites obtained from a reactive ball milling reduction of NiO in H2 atmosphere have been studied. The formation of ferromagnetic Ni from antiferromagnetic NiO can be accurately followed by the increase of the saturation magnetization. The microstructure of the nanocomposite, consisting of FM Ni nanoparticles embedded in an AFM NiO matrix leads to exchange bias effects, i.e., loop shifts and coercivity enhancement, after field cooling from above the Néel temperature of NiO.
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Guozhi, Xie, Wu Yuping, Lin Xiaoyan, Wang Zehua, Lin Pinghua, Gu Benxi i Du Youwei. "Ferromagnetic/antiferromagnetic exchange coupling in melt-spun NdFeB nanocomposites". Journal of Non-Crystalline Solids 352, nr 21-22 (lipiec 2006): 2137–42. http://dx.doi.org/10.1016/j.jnoncrysol.2006.02.069.

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Zawodzki, Michael, Lukas Weissitsch, Heinz Krenn, Stefan Wurster i Andrea Bachmaier. "Exchange Bias Demonstrated in Bulk Nanocomposites Processed by High-Pressure Torsion". Nanomaterials 13, nr 2 (14.01.2023): 344. http://dx.doi.org/10.3390/nano13020344.

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Ferromagnetic (Fe or Fe20Ni80) and antiferromagnetic (NiO) phases were deformed by high-pressure torsion, a severe plastic deformation technique, to manufacture bulk-sized nanocomposites and demonstrate an exchange bias, which has been reported predominantly for bilayer thin films. High-pressure torsion deformation at elevated temperatures proved to be the key to obtaining homogeneous bulk nanocomposites. X-ray diffraction investigations detected nanocrystallinity of the ferromagnetic and antiferromagnetic phases. Furthermore, an additional phase was identified by X-ray diffraction, which formed during deformation at elevated temperatures through the reduction of NiO by Fe. Depending on the initial powder composition of Fe50NiO50 or Fe10Ni40NiO50 the new phase was magnetite or maghemite, respectively. Magnetometry measurements demonstrated an exchange bias in high-pressure torsion-processed bulk nanocomposites. Additionally, the tailoring of magnetic parameters was demonstrated by the application of different strains or post-process annealing. A correlation between the amount of applied strain and exchange bias was found. The increase of exchange bias through applied strain was related to the microstructural refinement of the nanocomposite. The nanocrystalline maghemite was considered to have a crucial impact on the observed changes of exchange bias through applied strain.
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Mazza, Alessandro R., Elizabeth Skoropata, Jason Lapano, Michael A. Chilcote, Cameron Jorgensen, Nan Tang, Zheng Gai i in. "Hole doping in compositionally complex correlated oxide enables tunable exchange biasing". APL Materials 11, nr 3 (1.03.2023): 031118. http://dx.doi.org/10.1063/5.0142224.

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Magnetic interfaces and the phenomena arising from them drive both the design of modern spintronics and fundamental research. Recently, it was revealed that through designing magnetic frustration in configurationally complex entropy stabilized oxides, exchange bias can occur in structurally single crystal films. This eliminates the need for complex heterostructures and nanocomposites in the design and control of magnetic response phenomena. In this work, we demonstrate through hole doping of a high entropy perovskite oxide that tuning of magnetic responses can be achieved. With detailed magnetometry, we show magnetic coupling exhibiting a variety of magnetic responses including exchange bias and antiferromagnetic spin reversal in the entropy stabilized ABO3 perovskite oxide La1−xSrx(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 family. We find that manipulation of the A-site charge state can be used to balance magnetic phase compositions and coupling responses. This allows for the creation of highly tunable exchange bias responses. In the low Sr doping regime, a spin frustrated region arising at the antiferromagnetic phase boundary is shown to directly couple to the antiferromagnetic moments of the film and emerges as the dominant mechanism, leading to a vertical shift of magnetization loops in response to field biasing. At higher concentrations, direct coupling of antiferromagnetic and ferromagnetic regions is observed. This tunability of magnetic coupling is discussed within the context of these three competing magnetic phases, revealing critical features in designing exchange bias through exploiting spin frustration and disorder in high entropy oxides.
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Fischer, Arne, Robert Kruk, Di Wang i Horst Hahn. "Magnetic properties of iron cluster/chromium matrix nanocomposites". Beilstein Journal of Nanotechnology 6 (13.05.2015): 1158–63. http://dx.doi.org/10.3762/bjnano.6.117.

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A custom-designed apparatus was used for the fine-tuned co-deposition of preformed Fe clusters into antiferromagnetic Cr matrices. Three series of samples with precisely defined cluster sizes, with accuracy to a few atoms, and controlled concentrations were fabricated, followed by a complete characterization of structure and magnetic performance. Relevant magnetic characteristics, reflecting the ferromagnetic/antiferromagnetic coupling between Fe clusters and the Cr matrix, i.e., blocking temperature, coercivity field, and exchange bias were measured and their dependence on cluster size and cluster concentration in the matrix was analyzed. It is evident that the blocking temperatures are clearly affected by both the cluster size and their concentration in the Cr matrix. In contrast the coercivity shows hardly any dependence on size or inter-cluster distance. The exchange bias was found to be strongly sensitive to the cluster size but not to the inter-cluster distances. Therefore, it was concluded to be an effect that is purely localized at the interfaces.
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BUZNIKOV, N. A., I. T. IAKUBOV, A. L. RAKHMANOV, K. I. KUGEL i A. O. SBOYCHAKOV. "HIGH-FREQUENCY RESPONSE AND VOLTAGE NOISE IN MAGNETIC NANOCOMPOSITES". International Journal of Modern Physics B 23, nr 20n21 (20.08.2009): 4216–33. http://dx.doi.org/10.1142/s0217979209063389.

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We study the noise spectra and high-frequency permeability of inhomogeneous magnetic materials consisting of single-domain magnetic nanoparticles embedded into an insulating matrix. Possible mechanisms of 1/f voltage noise in phase-separated manganites is analyzed. The material is modelled by a system of small ferromagnetic metallic droplets (magnetic polarons or ferrons) in insulating antiferromagnetic or paramagnetic matrix. The electron transport is related to tunnelling of charge carriers between droplets. One of the sources of the 1/f noise in such a system stems from fluctuations of the number of droplets with extra electron. In the case of strong magnetic anisotropy, the 1/f noise can arise also due to the fluctuations of the magnetic moments of ferrons. The high frequency magnetic permeability of nanocomposite film with magnetic particles in insulating non-magnetic matrix is studied in detail. The case of strong magnetic dipole interaction and strong magnetic anisotropy of ferromagnetic granules is considered. The composite is modelled by a cubic regular array of ferromagnetic particles. The high-frequency permeability tensor components are found as a functions of frequency, temperature, ferromagnetic phase content, and magnetic anisotropy. The results demonstrate that magnetic dipole interaction leads to a shift of the resonance frequencies towards higher values, and nanocomposite film could have rather high value of magnetic permeability in the microwave range.
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Części książek na temat "Ferromagnetic-Antiferromagnetic-Nanocomposites"

1

Pati, Satya Prakash, i Dipankar Das. "Exchange Bias and Interfacial Magnetic Phenomena in Mechanically Milled Ferromagnetic/Antiferromagnetic Nanocomposites". W Frontiers in Materials Processing, Applications, Research and Technology, 365–75. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4819-7_32.

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Streszczenia konferencji na temat "Ferromagnetic-Antiferromagnetic-Nanocomposites"

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Granitzer, P., K. Rumpf, M. Hofmayer, H. Krenn, P. Pölt, A. Reichmann i F. Hofer. "Inter-Wire Antiferromagnetic Exchange Interaction in Ni/Si-Ferromagnetic/Semiconductor Nanocomposites". W PHYSICS OF SEMICONDUCTORS: 28th International Conference on the Physics of Semiconductors - ICPS 2006. AIP, 2007. http://dx.doi.org/10.1063/1.2730347.

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