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Title: Magnetic properties of manganites doped with gallium, iron, and chromium ions

Abstract

The magnetization and the crystal structure of the La{sub 0.7}Sr{sub 0.3}Mn{sub 1−x}M{sub x}O{sub 3} (M = Ga, Fe, Cr; x ≤ 0.3) systems are studied. The substitution of gallium and chromium is shown to cause phase separation into antiferromagnetic and ferromagnetic phases, whereas the substitution of iron for manganese stabilizes a spinglass state. The ferromagnetic phase in the chromium-substituted compositions is much more stable than that in the case of substitution by iron ions or diamagnetic gallium ions. The magnetic properties are explained in terms of the model of superexchange interactions and the localization of most e{sub g} electrons of manganese. The stabilization of ferromagnetism in the chromium-substituted compositions can be caused by the fact that the positive and negative contributions to the superexchange interaction between Mn{sup 3+} and Cr{sup 3+} ions are close to each other but the antiferromagnetic part of the exchange is predominant. Moreover, some chromium ions are in the tetravalent state, which maintains the optimum doping conditions.

Authors:
; ;  [1];  [2];  [3];  [4]
  1. National Academy of Sciences of Belarus, Scientific and Practical Materials Research Center (Belarus)
  2. Belarussian State Agrarian Technical University (Belarus)
  3. Joint Institute for Nuclear Research (Russian Federation)
  4. Helmholtz Center (Germany)
Publication Date:
OSTI Identifier:
22472260
Resource Type:
Journal Article
Journal Name:
Journal of Experimental and Theoretical Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 5; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7761
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTIFERROMAGNETISM; CHROMIUM COMPOUNDS; CHROMIUM IONS; CRYSTAL STRUCTURE; DOPED MATERIALS; ELECTRONS; EXCHANGE INTERACTIONS; FERROMAGNETISM; GALLIUM COMPOUNDS; GALLIUM IONS; IRON COMPOUNDS; IRON IONS; LANTHANUM COMPOUNDS; MAGNETIC PROPERTIES; MAGNETIZATION; MANGANATES; MANGANESE IONS; STABILIZATION; STRONTIUM COMPOUNDS

Citation Formats

Troyanchuk, I. O., E-mail: troyan@physics.by, Bushinsky, M. V., Tereshko, N. V., Dobryanskii, V. M., Sikolenko, V., and Többens, D. M. Magnetic properties of manganites doped with gallium, iron, and chromium ions. United States: N. p., 2015. Web. doi:10.1134/S1063776115040160.
Troyanchuk, I. O., E-mail: troyan@physics.by, Bushinsky, M. V., Tereshko, N. V., Dobryanskii, V. M., Sikolenko, V., & Többens, D. M. Magnetic properties of manganites doped with gallium, iron, and chromium ions. United States. doi:10.1134/S1063776115040160.
Troyanchuk, I. O., E-mail: troyan@physics.by, Bushinsky, M. V., Tereshko, N. V., Dobryanskii, V. M., Sikolenko, V., and Többens, D. M. Fri . "Magnetic properties of manganites doped with gallium, iron, and chromium ions". United States. doi:10.1134/S1063776115040160.
@article{osti_22472260,
title = {Magnetic properties of manganites doped with gallium, iron, and chromium ions},
author = {Troyanchuk, I. O., E-mail: troyan@physics.by and Bushinsky, M. V. and Tereshko, N. V. and Dobryanskii, V. M. and Sikolenko, V. and Többens, D. M.},
abstractNote = {The magnetization and the crystal structure of the La{sub 0.7}Sr{sub 0.3}Mn{sub 1−x}M{sub x}O{sub 3} (M = Ga, Fe, Cr; x ≤ 0.3) systems are studied. The substitution of gallium and chromium is shown to cause phase separation into antiferromagnetic and ferromagnetic phases, whereas the substitution of iron for manganese stabilizes a spinglass state. The ferromagnetic phase in the chromium-substituted compositions is much more stable than that in the case of substitution by iron ions or diamagnetic gallium ions. The magnetic properties are explained in terms of the model of superexchange interactions and the localization of most e{sub g} electrons of manganese. The stabilization of ferromagnetism in the chromium-substituted compositions can be caused by the fact that the positive and negative contributions to the superexchange interaction between Mn{sup 3+} and Cr{sup 3+} ions are close to each other but the antiferromagnetic part of the exchange is predominant. Moreover, some chromium ions are in the tetravalent state, which maintains the optimum doping conditions.},
doi = {10.1134/S1063776115040160},
journal = {Journal of Experimental and Theoretical Physics},
issn = {1063-7761},
number = 5,
volume = 120,
place = {United States},
year = {2015},
month = {5}
}