Magnetic phase transitions in the system La1-xBixMnO3+l

Дефекты в кристаллах

Автор(и)

  • I. O. Troyanchuk Institute of Solid State and Semiconductor Physics of National Academy of Sciences of Belarus 17 P. Brovki Str., Minsk 220072, Belarus
  • O. S. Mantytskaja Institute of Solid State and Semiconductor Physics of National Academy of Sciences of Belarus 17 P. Brovki Str., Minsk 220072, Belarus
  • H. Szymczak Institute of Physics of Polish Academy of Sciences 32/46 Al. Lotnikow Str., Warsaw PL-02-668, Poland
  • M. Yu. Shvedun B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Science of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukrain

DOI:

https://doi.org/10.1063/1.1496669

Ключові слова:

PACS: 72.15.Gd, 75.30.Kz, 75.70.Pa

Анотація

The crystal structure and magnetic properties of the La1-xBixMnO3+l system( ; 0 £ x1£ l £ 0.08 ) are studied as functions of the oxygen and bismuth contents. In oxidized samples La1-xBixMnO3+l 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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Опубліковано

2002-06-10

Як цитувати

(1)
Troyanchuk, I. O.; Mantytskaja, O. S.; Szymczak, H.; Shvedun, M. Y. Magnetic Phase Transitions in the System La1-xBixMnO3+l: Дефекты в кристаллах. Fiz. Nizk. Temp. 2002, 28, 790-795.

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