Causes of the Metamagnetism in a Disordered EuMn0.5Co0.5O3 Perovskite
- Авторы: Troyanchuk I.O.1, Bushinsky M.V.1, Tereshko N.V.1, Vasiliev A.N.2,3,4
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Учреждения:
- Scientific–Practical Materials Research Centre
- Moscow State University
- Ural Federal University
- South Ural State University
- Выпуск: Том 126, № 6 (2018)
- Страницы: 811-815
- Раздел: Order, Disorder, and Phase Transition in Condensed System
- URL: https://journals.rcsi.science/1063-7761/article/view/193222
- DOI: https://doi.org/10.1134/S1063776118050072
- ID: 193222
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Аннотация
The magnetic properties of the EuMn0.5Co0.5O3 perovskite synthesized under various conditions are studied in fields up to 140 kOe. The sample synthesized at T = 1500°C is shown to exhibit a metamagnetic phase transition, which is irreversible below T = 40 K, and the sample synthesized at T = 1200°C demonstrates the field dependence of magnetization that is typical of a ferromagnet. Both samples have TC = 123 K and approximately the same magnetization in high magnetic fields. The metamagnetism is assumed to be related to a transition from a noncollinear ferromagnetic phase to a collinear phase, and the presence of clusters with ordered Co2+ and Mn4+ ions leads to ferromagnetism. The noncollinear phase is formed due to the competition between positive Co2+–Mn4+ and negative Mn4+–Mn4+ and Co2+–Co2+ interactions, which make almost the same contributions, and to the existence of a high magnetic anisotropy.
Об авторах
I. Troyanchuk
Scientific–Practical Materials Research Centre
Автор, ответственный за переписку.
Email: troyan@physics.by
Белоруссия, ul. P. Brovki 19, Minsk, 220072
M. Bushinsky
Scientific–Practical Materials Research Centre
Email: troyan@physics.by
Белоруссия, ul. P. Brovki 19, Minsk, 220072
N. Tereshko
Scientific–Practical Materials Research Centre
Email: troyan@physics.by
Белоруссия, ul. P. Brovki 19, Minsk, 220072
A. Vasiliev
Moscow State University; Ural Federal University; South Ural State University
Email: troyan@physics.by
Россия, Moscow, 119991; ul. Mira 19, Yekaterinburg, 620002; pr. Lenina 76, Chelyabinsk, 454080
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