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Artigos de revistas sobre o tema "Manganese perovskites"

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Publicado: 25 de maio de 2024

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1

Liu, Wei, Liang Chu, Nanjing Liu, Yuhui Ma, Ruiyuan Hu, Yakui Weng, Hui Li, Jian Zhang, Xing’ao Li e Wei Huang. "Efficient perovskite solar cells fabricated by manganese cations incorporated in hybrid perovskites". Journal of Materials Chemistry C 7, n.º 38 (2019): 11943–52. http://dx.doi.org/10.1039/c9tc03375k.

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2

Alagheband, Razieh, Sarah Maghsoodi, Amirhossein Shahbazi Kootenaei e Hassan Kianmanesh. "Synthesis and Evaluation of ABO3 Perovskites (A=La and B=Mn, Co) with Stoichiometric and Over-stoichiometric Ratios of B/A for Catalytic Oxidation of Trichloroethylene". Bulletin of Chemical Reaction Engineering & Catalysis 13, n.º 1 (2 de abril de 2018): 47. http://dx.doi.org/10.9767/bcrec.13.1.1188.47-56.

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In this contribution, perovskite catalysts (ABO3) were probed that site A and site B were occupied by lanthanum and transition metals of manganese or cobalt, respectively, with stoichiometric ratios as well as 20 % over-stoichiometric ratios of B/A. The perovskite samples were synthesized using a gel-combustion method and characterized by BET, XRD, SEM and O2-TPD analyses. After mounting in a fixed bed reactor, the catalysts were examined in atmospheric pressure conditions at different temperatures for oxidation of 1000 ppm trichloroethylene in the air. Evaluation of over-stoichiometric catalysts activity showed that the increased ratio of B/A in the catalysts compared to the stoichiometric one led to BET surface area, oxygen mobility, and consequently catalytic performance improvement. The lanthanum manganite perovskite with 20 % excess manganese yielded the best catalytic performance among the probed perovskites. Copyright © 2018 BCREC Group. All rights reservedReceived: 28th April 2017; Revised: 31st July 2017; Accepted: 4th August 2017; Available online: 22nd January 2018; Published regularly: 2nd April 2018How to Cite: Alagheband, R., Maghsoodi, S., Kootenaei, A.S., Kianmanesh, H. (2018). Synthesis and Evaluation of ABO3 Perovskites (A=La and B=Mn, Co) with Stoichiometric and Over-stoichiometric Ratios of B/A for Catalytic Oxidation of Trichloroethylene. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (1): 47-56 (doi:10.9767/bcrec.13.1.1188.47-56)

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3

Karpenko, Boris V., Lyubov D. Falkovskaya e Alexandr V. Kuznetsov. "Magnetization of Manganese Perovskites". Israel Journal of Chemistry 47, n.º 3-4 (dezembro de 2007): 397–400. http://dx.doi.org/10.1560/ijc.47.3-4.397.

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4

ZHANG, NING. "SPIN-POLARIZATION DEPENDENT SMALL POLARON HOPPING IN MANGANESE PEROVSKITES". Modern Physics Letters B 17, n.º 01 (10 de janeiro de 2003): 25–38. http://dx.doi.org/10.1142/s0217984903004816.

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A model of small polaron hopping being dependent on spin-polarization is suggested to describe the transport and the colossal magnetoresistance behaviors in manganese perovskites R-A-Mn-O (R: rear earth; A: alkali earth or transition metals). Being different from the theory of simple small polarons, the double exchange interaction and some empirical rules related to lattice effect induced by an external magnetic field and changing concentration have been taken into account. Based on this, a simple formula of resistivity versus temperature, concentration and normalized magnetization has been obtained for the hole-doped perovskite. From the formula, most of the transport behaviors including the colossal magnetoresistive observed in the perovskite have been successfully illustrated.

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5

Hueso, L. E., A. Fondado, J. Rivas, F. Rivadulla e M. A. López-Quintela. "Efectos intergranulares en perovskitas de manganeso nanocristalinas". Boletín de la Sociedad Española de Cerámica y Vidrio 39, n.º 3 (30 de junho de 2000): 259–62. http://dx.doi.org/10.3989/cyv.2000.v39.i3.837.

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6

Stefańska, Dagmara. "Effect of Organic Cation on Optical Properties of [A]Mn(H2POO)3 Hybrid Perovskites". Molecules 27, n.º 24 (15 de dezembro de 2022): 8953. http://dx.doi.org/10.3390/molecules27248953.

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Hybrid organic–inorganic compounds crystallizing in a three-dimensional (3D) perovskite-type architecture have attracted considerable attention due to their multifunctional properties. One of the most intriguing groups is perovskites with hypophosphite linkers. Herein, the optical properties of six hybrid hypophosphite perovskites containing manganese ions are presented. The band gaps of these compounds, as well as the luminescence properties of the octahedrally coordinated Mn2+ ions associated with the 4T1g(G) → 6A1g(S) transition are shown to be dependent on the organic cation type and Goldschmidt tolerance factor. Thus, a correlation between essential structural features of Mn-based hybrid hypophosphites and their optical properties was observed. Additionally, the broad infrared luminescence of the studied compounds was examined for potential application in an indoor lighting system for plant growth.

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7

Yang, Zhengqiang, Guanqun Cai, Craig L. Bull, Matthew G. Tucker, Martin T. Dove, Alexandra Friedrich e Anthony E. Phillips. "Hydrogen-bond-mediated structural variation of metal guanidinium formate hybrid perovskites under pressure". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 377, n.º 2149 (27 de maio de 2019): 20180227. http://dx.doi.org/10.1098/rsta.2018.0227.

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The hybrid perovskites are coordination frameworks with the same topology as the inorganic perovskites, but with properties driven by different chemistry, including host-framework hydrogen bonding. Like the inorganic perovskites, these materials exhibit many different phases, including structures with potentially exploitable functionality. However, their phase transformations under pressure are more complex and less well understood. We have studied the structures of manganese and cobalt guanidinium formate under pressure using single-crystal X-ray and powder neutron diffraction. Under pressure, these materials transform to a rhombohedral phase isostructural to cadmium guanidinium formate. This transformation accommodates the reduced cell volume while preserving the perovskite topology of the framework. Using density-functional theory calculations, we show that this behaviour is a consequence of the hydrogen-bonded network of guanidinium ions, which act as struts protecting the metal formate framework against compression within their plane. Our results demonstrate more generally that identifying suitable host–guest hydrogen-bonding geometries may provide a route to engineering hybrid perovskite phases with desirable crystal structures. This article is part of the theme issue ‘Mineralomimesis: natural and synthetic frameworks in science and technology’.

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8

Millis, A. J. "Lattice effects in magnetoresistive manganese perovskites". Nature 392, n.º 6672 (março de 1998): 147–50. http://dx.doi.org/10.1038/32348.

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9

Fontcuberta, J., J. L. Garcı́a-Muñoz, M. Suaaidi, B. Martı́nez, S. Piñol e X. Obradors. "Competing magnetic interactions in manganese perovskites". Journal of Applied Physics 81, n.º 8 (15 de abril de 1997): 5481–83. http://dx.doi.org/10.1063/1.364633.

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10

Ibarra, M. R., e J. M. De Teresa. "Colossal magnetoresistance in manganese oxide perovskites". Journal of Magnetism and Magnetic Materials 177-181 (janeiro de 1998): 846–49. http://dx.doi.org/10.1016/s0304-8853(97)00801-9.

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11

Rudskaya, A. G., N. B. Kofanova, L. E. Pustovaya, B. S. Kul’buzhev e M. F. Kupriyanov. "Phase transitions in manganese-containing perovskites". Physics of the Solid State 46, n.º 10 (outubro de 2004): 1922–26. http://dx.doi.org/10.1134/1.1809432.

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12

Bartoň, Jaroslav, e Vladimír Pour. "Oxidation of carbon monoxide by oxygen over pure and platinum-doped LaMnO3 perovskites". Collection of Czechoslovak Chemical Communications 55, n.º 8 (1990): 1928–34. http://dx.doi.org/10.1135/cccc19901928.

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The properties of pure and platinum-doped LaMnO3 perovskites, including their catalytic activities for the reaction of CO with oxygen, have been determined. Perovskite samples were prepared by decomposition of lanthanum and manganese citrates. The surface areas were 12.2 m2/g for pure LaMnO3 and 9.8 m2/g for the platinum-doped sample. The doping with a small amount of platinum markedly enhances the catalytic activity of LaMnO3 perovskite. The (CO + O2) reaction starts at 200 °C over LaMnO3 and at temperatures below 100 °C over a sample doped with Pt. The reaction kinetics for both the pure and platinum-doped LaMnO3 can be described by empirical equation (4). When Pt-doped perovskite is used, an increase in the apparent activation energy occurs at about 150 °C. This fact is attributed to a change in the mechanism of CO oxidation.

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13

Sawaguri, Hiroki, Daichi Yasuhara e Nobuyuki Gokon. "Redox Performance and Optimization of the Chemical Composition of Lanthanum–Strontium–Manganese-Based Perovskite Oxide for Two-Step Thermochemical CO2 Splitting". Processes 11, n.º 9 (11 de setembro de 2023): 2717. http://dx.doi.org/10.3390/pr11092717.

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The effects of substitution at the A- and B sites on the redox performance of a series of lanthanum–strontium–manganese (LSM)-based perovskite oxides (Z = Ni, Co, and Mg) were studied for application in a two-step thermochemical CO2 splitting cycle to produce liquid fuel from synthesis gas using concentrated solar radiation as the proposed energy source and CO2 recovered from the atmosphere as the prospective chemical source. The redox reactivity, stoichiometry of oxygen/CO production, and optimum chemical composition of Ni-, Co-, and Mg-substituted LSM perovskites were investigated to enhance oxygen/CO productivity. Furthermore, the long-term thermal stabilities and thermochemical repeatabilities of the oxides were evaluated and compared with previous data. The valence changes in the constituent ionic species of the perovskite oxides were studied and evaluated by X-ray photoelectron spectroscopy (XPS) for each step of the thermochemical cycle. From the perspectives of high redox reactivity, stoichiometric oxygen/CO production, and thermally stable repeatability in long-term thermochemical cycling, Ni0.20-, Co0.35-, and Mg0.125-substituted La0.7Sr0.3Mn perovskite oxides are the most promising materials among the LSM perovskite oxides for two-step thermochemical CO2 splitting, showing CO productivities of 387–533 μmol/g and time-averaged CO productivities of 12.9–18.0 μmol/(min·g) compared with those of LSM perovskites reported in the literature.

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14

Bakaleinikov, L., e A. Gordon. "Giant oxygen isotope effect in manganese perovskites". Physica B: Condensed Matter 395, n.º 1-2 (maio de 2007): 76–78. http://dx.doi.org/10.1016/j.physb.2007.02.035.

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15

Gavrichkov, V. A., e S. G. Ovchinnikov. "An impurity resistivity of doped manganese perovskites". Physica B: Condensed Matter 259-261 (janeiro de 1999): 828–30. http://dx.doi.org/10.1016/s0921-4526(98)00875-8.

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16

Jaenicke, S., G. K. Chuah e J. Y. Lee. "Catalytic CO oxidation over manganese-containing perovskites". Environmental Monitoring and Assessment 19, n.º 1-3 (1991): 131–38. http://dx.doi.org/10.1007/bf00401304.

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17

Radaelli, P. G., D. N. Argyriou, D. E. Cox, L. Capogna, H. Casalta, K. Andersen, S.-W. Cheong, J. F. Mitchell e M. Marezio. "ChemInform Abstract: Phase Segregation in Manganese Perovskites". ChemInform 30, n.º 41 (13 de junho de 2010): no. http://dx.doi.org/10.1002/chin.199941275.

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18

Perin, G., M. Guiotto, M. M. Natile, P. Canu e A. Glisenti. "Manganese Based Perovskites in Ethanol Steam Reforming". Catalysis Letters 148, n.º 1 (23 de outubro de 2017): 220–26. http://dx.doi.org/10.1007/s10562-017-2207-1.

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19

Winterhalder, Franziska Elisabeth, Yousef Alizad Farzin, Olivier Guillon, Andre Weber e Norbert H. Menzler. "Perovskite-Based Materials As Alternative Fuel Electrodes for Solid Oxide Electrolysis Cells (SOECs)". ECS Transactions 111, n.º 6 (19 de maio de 2023): 1115–23. http://dx.doi.org/10.1149/11106.1115ecst.

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Perovskites show high potential as alternative fuel electrodes in solid oxide electrolysis cells (SOECs) due to their high chemical stability, high conductivity, good catalytic activity and cost-effectiveness. In this work, four perovskites (strontium-iron-niobate double perovskite (SFN), strontium-iron-titanate (STF), lanthanum-strontium-titanate (LST), and lanthanum-strontium-iron-manganese (LSFM)) were examined as fuel electrode materials for SOECs. First, the chemical stability of the perovskites in a reducing atmosphere and the reactivity between the electrode and electrolyte material were analyzed. Besides featuring good chemical stability under reducing conditions, SFN double perovskite and LST exhibit the lowest interaction with the electrolyte (yttria-stabilized zirconia, 8YSZ) after thermal treatment. The results indicate a need for a barrier layer between the tested electrode materials and the YSZ electrolyte to achieve sufficient cell performance throughout its operation in the electrolysis mode. After thoroughly evaluating all preliminary tests, STF was chosen for the first subsequent electrochemical tests. Initial impedance measurements of symmetrical electrolyte-supported cells consisting of pure STF-based electrodes with and without a barrier layer between the electrodes and the electrolyte were conducted to obtain a base for further optimization. For the 5STF fuel electrode, the obtained EIS data confirm the conclusion from the reactivity experiments. Applying a barrier layer at the 5STF fuel electrode/ electrolyte interface is needed to reduce the cell´s ohmic and polarization resistances.

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20

Zubov, É. E., V. P. Dyakonov e H. Szymczak. "Noncollinear cluster ferromagnetism in lanthanum manganite perovskites with an excess of manganese". Journal of Experimental and Theoretical Physics 95, n.º 6 (dezembro de 2002): 1044–55. http://dx.doi.org/10.1134/1.1537296.

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21

Zhou, Su, Yiwen Zhu, Jiasong Zhong, Feifan Tian, Hai Huang, Jiangkun Chen e Daqin Chen. "Chlorine-additive-promoted incorporation of Mn2+ dopants into CsPbCl3 perovskite nanocrystals". Nanoscale 11, n.º 26 (2019): 12465–70. http://dx.doi.org/10.1039/c9nr04663a.

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22

Wang, Bai Bin, Chi Fen Chang, Yan Ru Li, Thanh Nam Chau e Wein Duo Yang. "Synthesis and Light-Emission Properties of Manganese-Doped Calcium Zirconate Phosphor and Manganese-Doped Strontium Zirconate Phosphor". Applied Mechanics and Materials 234 (novembro de 2012): 1–6. http://dx.doi.org/10.4028/www.scientific.net/amm.234.1.

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This study successfully synthesized manganese-doped calcium zirconate phosphor and manganese-doped strontium zirconate phosphor using the sol-gel method. We employed X-ray powder diffraction and fluorescence spectroscopy to analyze the crystal structure and spectral characteristics of both phosphors. In X-ray powder diffraction analysis, data related to manganese-doped calcium zirconate phosphor and manganese-doped strontium zirconate phosphor were compared using X-ray diffraction comparison software to confirm the crystal structures of both phosphors. The crystal structure of manganese-doped calcium zirconate phosphor was in accordance with orthorhombic perovskites belonging to the Pnma {62} space group. The lattice parameters were a=5.762 Å, b=8.017 Å, and c=5.591 Å; c/a=0.97; volume=258.3 Å3, and density=4.611 g/cm3. The crystal structure of manganese-doped strontium zirconate phosphor conformed to orthorhombic perovskites belonging to the Pnma {62} space group, and the lattice parameters were a=5.818 Å, b=8.204 Å, c=5.797 Å; c/a=0.996; volume=276.7 Å3, and density=5.446 g/cm3. Fluorescence spectroscopy indicated that the primary broadband peak of manganese-doped calcium zirconate phosphor was located at 396.6 nm in the excitation spectrum corresponding to the 4T2(4G)4T1(4P) energy level transition. In the emission spectrum, the primary broadband peak was located at 596.6 nm, corresponding to the 4T2(4D)4T2(4G) energy level transition. For manganese-doped strontium zirconate phosphor, the primary broadband peak was located at 496.6 nm in the excitation spectrum and at 696.6 nm in the emission spectrum, corresponding to the 4T1(4G)4T2(4D) and 4E(4G)4T1(4G) energy level transitions, respectively.

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23

MIRA, J., e J. RIVAS. "FIRST-ORDER MAGNETIC PHASE TRANSITIONS AND COLOSSAL MAGNETORESISTANCE: JOINING MANGANESE PEROVSKITES AND MnAs". Modern Physics Letters B 18, n.º 15 (20 de junho de 2004): 725–47. http://dx.doi.org/10.1142/s0217984904007268.

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We revise some recent results on the nature of the magnetic phase transition of ferromagnetic manganese perovskites with colossal magnetoresistance. It is found that they exhibit first-order magnetic phase transitions mainly due to strong lattice effects. The presence of such first-order transition is strongly linked to the existence of a temperature region above the Curie Temperature with a phase-separated regime of coexisting metallic and insulating clusters. This situation is compared with that of MnAs , paradigm of system with first-order magnetic phase transition, and we observe a parallel phenomenology of these apparently different systems. This serves as a clue for the finding of a phase-separated regime also in MnAs and, moreover, for the finding of a colossal magnetoresistive effect similar to that of manganese perovskites.

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24

Balcells, Ll, R. Enrich, J. Mora, A. Calleja, J. Fontcuberta e X. Obradors. "Manganese perovskites: Thick‐film based position sensors fabrication". Applied Physics Letters 69, n.º 10 (2 de setembro de 1996): 1486–88. http://dx.doi.org/10.1063/1.116916.

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25

Batista, C. D., J. Eroles, M. Avignon e B. Alascio. "Electron-doped manganese perovskites: The magnetic polaron state". Physical Review B 58, n.º 22 (1 de dezembro de 1998): R14689—R14692. http://dx.doi.org/10.1103/physrevb.58.r14689.

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26

Balcells, Ll, J. Fontcuberta, B. Martínez e X. Obradors. "High-field magnetoresistance at interfaces in manganese perovskites". Physical Review B 58, n.º 22 (1 de dezembro de 1998): R14697—R14700. http://dx.doi.org/10.1103/physrevb.58.r14697.

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27

Alonso, José M., Alfredo Arroyo, José M. González-Calbet, Antonio Hernando, Juan M. Rojo e María Vallet-Regí. "A Hole-Attractor Model: Tailoring Manganese-Related Perovskites". Chemistry of Materials 15, n.º 15 (julho de 2003): 2864–66. http://dx.doi.org/10.1021/cm0343599.

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28

Carp, O., L. Patron, A. Ianculescu, J. Pasuk e R. Olar. "New synthesis routes for obtaining dysprosium manganese perovskites". Journal of Alloys and Compounds 351, n.º 1-2 (março de 2003): 314–18. http://dx.doi.org/10.1016/s0925-8388(02)01079-4.

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29

Licci, F., G. Turilli e P. Ferro. "Determination of manganese valence in complex LaMn perovskites". Journal of Magnetism and Magnetic Materials 164, n.º 3 (dezembro de 1996): L268—L272. http://dx.doi.org/10.1016/s0304-8853(96)00623-3.

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30

Ramesh, R., T. Venkatesan, S. B. Ogale, R. L. Greene e S. M. Bhagat. "Colossal magnetoresistivity in manganese-based perovskites (invited) (abstract)". Journal of Applied Physics 79, n.º 8 (1996): 5292. http://dx.doi.org/10.1063/1.361354.

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31

Troyanchuk, I. O., N. V. Samsonenko, N. V. Kasper, H. Szymczak e A. Nabialek. "Magnetic ordering in perovskites containing manganese and cobalt". Journal of Physics: Condensed Matter 9, n.º 39 (29 de setembro de 1997): 8287–95. http://dx.doi.org/10.1088/0953-8984/9/39/013.

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32

Chipara, M., R. Skomski, S. H. Liou, P. A. Dowben e S. Adenwalla. "On the absence of bipolarons in manganese perovskites". Materials Letters 59, n.º 2-3 (fevereiro de 2005): 297–301. http://dx.doi.org/10.1016/j.matlet.2004.10.007.

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Phan, Manh-Huong, Hua-Xin Peng, Seong-Cho Yu, Nguyen Duc Tho, Hoang Nam Nhat e Nguyen Chau. "Manganese perovskites for room temperature magnetic refrigeration applications". Journal of Magnetism and Magnetic Materials 316, n.º 2 (setembro de 2007): e562-e565. http://dx.doi.org/10.1016/j.jmmm.2007.03.021.

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34

Damay, F., N. Nguyen, A. Maignan, M. Hervieu e B. Raveau. "Colossal magnetoresistance properties of samarium based manganese perovskites". Solid State Communications 98, n.º 11 (junho de 1996): 997–1001. http://dx.doi.org/10.1016/0038-1098(96)00151-2.

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35

Park, J. H. "Spin Dependent Electronic Structure of Doped Manganese Perovskites". Surface Science Spectra 6, n.º 4 (outubro de 1999): 313–16. http://dx.doi.org/10.1116/1.1247935.

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36

Reagor, D. W., S. Y. Lee, Y. Li e Q. X. Jia. "Work function of the mixed-valent manganese perovskites". Journal of Applied Physics 95, n.º 12 (15 de junho de 2004): 7971–75. http://dx.doi.org/10.1063/1.1737802.

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37

Rodenbough, Philip P., e Siu-Wai Chan. "Thermal oxygen exchange cycles in mixed manganese perovskites". Ceramics International 44, n.º 2 (fevereiro de 2018): 1343–47. http://dx.doi.org/10.1016/j.ceramint.2017.08.168.

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38

Yamada, Ikuya, Hiroshi Fujii, Akihiko Takamatsu, Hidekazu Ikeno, Kouhei Wada, Hirofumi Tsukasaki, Shogo Kawaguchi, Shigeo Mori e Shunsuke Yagi. "Bifunctional Oxygen Reaction Catalysis of Quadruple Manganese Perovskites". Advanced Materials 29, n.º 4 (25 de novembro de 2016): 1603004. http://dx.doi.org/10.1002/adma.201603004.

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39

Ciupa-Litwa, Aneta, Maciej Ptak, Edyta Kucharska, Jerzy Hanuza e Mirosław Mączka. "Vibrational Properties and DFT Calculations of Perovskite-Type Methylhydrazinium Manganese Hypophosphite". Molecules 25, n.º 21 (9 de novembro de 2020): 5215. http://dx.doi.org/10.3390/molecules25215215.

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Recently discovered hybrid perovskites based on hypophosphite ligands are a promising class of compounds exhibiting unusual structural properties and providing opportunities for construction of novel functional materials. Here, we report for the first time the detailed studies of phonon properties of manganese hypophosphite templated with methylhydrazinium cations ([CH3NH2NH2][Mn(H2PO2)3]). Its room temperature vibrational spectra were recorded for both polycrystalline sample and a single crystal. The proposed assignment based on Density Functional Theory (DFT) calculations of the observed vibrational modes is also presented. It is worth noting this is first report on polarized Raman measurements in this class of hybrid perovskites.

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40

Ruiz-Gonzalez, Luisa, Raquel Cortes-Gil, Jose M. Alonso, Jose M. Gonzalez-Calbet e Maria Vallet-Regi. "Revisiting the Role of Vacancies in Manganese Related Perovskites". Open Inorganic Chemistry Journal 1, n.º 1 (5 de dezembro de 2007): 37–46. http://dx.doi.org/10.2174/1874098700701010037.

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41

Dai, Pengcheng, H. Y. Hwang, Jiandi Zhang, J. A. Fernandez-Baca, S. W. Cheong, C. Kloc, Y. Tomioka e Y. Tokura. "Magnon damping by magnon-phonon coupling in manganese perovskites". Physical Review B 61, n.º 14 (1 de abril de 2000): 9553–57. http://dx.doi.org/10.1103/physrevb.61.9553.

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42

Park, J. H., C. T. Chen, S.-W. Cheong, W. Bao, G. Meigs, V. Chakarian e Y. U. Idzerda. "Electronic Aspects of the Ferromagnetic Transition in Manganese Perovskites". Physical Review Letters 76, n.º 22 (27 de maio de 1996): 4215–18. http://dx.doi.org/10.1103/physrevlett.76.4215.

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Mahesh, R. "Giant Oxygen Isotope Effect in Charge-Ordered Manganese Perovskites". Journal of Solid State Chemistry 144, n.º 1 (abril de 1999): 232–35. http://dx.doi.org/10.1006/jssc.1999.8160.

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