Evolution of spatial spin-modulated structure with La doping in Bi1-yLayFeO3 multiferroics

Pokatilov, V.S.; Makarova, A.O.; Gippius, A.A.; Tkachev, A.V.; Zhurenko, S.V.; Bagdinova, A.N.; Gervits, N.E.

Авторы: Pokatilov V.S., Makarova A.O., Gippius A.A., Tkachev A.V., Zhurenko S.V., Bagdinova A.N., Gervits N.E.
Журнал: Journal of Magnetism and Magnetic Materials
Том: 517
Год издания: 2021
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 167341
DOI: 10.1016/j.jmmm.2020.167341
Аннотация: In this paper we present study of the magnetic structure of multiferroic series Bi1-yLayFeO3 (y = 0, 0.015, 0.03, 0.05 and 0.10) using nuclear magnetic resonance (NMR) at 4.2 K and Mössbauer spectroscopy at room temperature on 57Fe nuclei. We observed the presence of cycloid type spatial spin-modulated structure (SSMS) in the whole range of compositions. The study of the concentration dependence of the anharmonicity parameter m revealed that at the temperature of liquid helium the magnetic state of multiferroics in the composition region y = 0 – 0.10 is described by cycloid type SSMS with a positive effective uniaxial constant of magnetic anisotropy Κu > 0 (“easy axis” model). The study at room temperature in turn revealed that magnetic state of the multiferroics with y = 0 – 0.03 is described by cycloid type SSMS with a positive effective uniaxial constant of magnetic anisotropy Κu > 0 (“easy axis” model). In contrast, the magnetic state of multiferroics with y = 0.05 and 0.10 is described by a negative effective uniaxial constant of magnetic anisotropy Κu < 0 (“easy plane” model). Anharmonicity parameter m at room temperature for y = 0.03 – 0.05 is close to zero, which means that SSMS in this range of compositions is close to harmonic.
Добавил в систему: Гиппиус Андрей Андреевич

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Evolution of spatial spin-modulated structure with La doping in Bi1-yLayFeO3 multiferroicsстатья

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