Magnetic phase transitions in the system La₁₋xBixMnO₃₊λ
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
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Magnetic phase transitions in the system La₁₋xBixMnO₃₊λ
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| Creator |
Troyanchuk, I.O.
Mantytskaja, O.S. Szymczak, H. Shvedun, M.Yu. |
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| Subject |
Дефекты в кристаллах
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| Description |
The crystal structure and magnetic properties of the La₁₋xBixMnO₃₊λ system (0⩽x⩽1;λ⩽0.08) are studied as functions of the oxygen and bismuth contents. In oxidized samples La₁₋xBixMnO₃₊λ a phase transition from a ferromagnetic state (rhombohedric phase) to a state of the spin glass type (quasitetragonal phase) is observed with increase of the bismuth concentration. The reduced samples La₁₋xBixMnO₃ are weak ferromagnets down to x⩽0.6 and then transform into a ferromagnetic state. It is supposed that the Bi³⁺ ions stabilize the dx2−y2 orbitals in the nearest Mn³⁺ ions whereas the dz2 orbitals of the La³⁺ ions are stabilized. The orbitally disordered phases and dx2−y2-orbitally ordered phases are ferromagnetic, the dz2-orbitally ordered phases show antiferromagnetic ordering, and the state of the orbital glass type corresponds to a state of the spin glass type.
The crystal structure and magnetic properties of the La₁₋xBixMnO₃₊λ system (0⩽x⩽1;λ⩽0.08) are studied as functions of the oxygen and bismuth contents. In oxidized samples La₁₋xBixMnO₃₊λ a phase transition from a ferromagnetic state (rhombohedric phase) to a state of the spin glass type (quasitetragonal phase) is observed with increase of the bismuth concentration. The reduced samples La₁₋xBixMnO₃ are weak ferromagnets down to x⩽0.6 and then transform into a ferromagnetic state. It is supposed that the Bi³⁺ ions stabilize the dx2−y2 orbitals in the nearest Mn³⁺ ions whereas the dz2 orbitals of the La³⁺ ions are stabilized. The orbitally disordered phases and dx2−y2-orbitally ordered phases are ferromagnetic, the dz2-orbitally ordered phases show antiferromagnetic ordering, and the state of the orbital glass type corresponds to a state of the spin glass type. |
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| Date |
2018-02-09T10:59:15Z
2018-02-09T10:59:15Z 2002 |
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| Type |
Article
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| Identifier |
Magnetic phase transitions in the system La₁₋xBixMnO₃₊λ / I.O. Troyanchuk, O.S. Mantytskaja, H.Szymczak, M.Yu. Shvedun // Физика низких температур. — 2002. — Т. 28, № 7. — С. 790-795. — Бібліогр.: 28 назв. — англ.
0132-6414 PACS: 72.15.Gd, 75.30.Kz, 75.70.Pa http://dspace.nbuv.gov.ua/handle/123456789/130236 |
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en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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