Evidence for non-Dzyaloshinskii–Moriya ferromagnetism in epitaxial BiFeO₃ films

Evidence for non-Dzyaloshinskii–Moriya ferromagnetism in epitaxial BiFeO₃ films

Prokhorov, V.G. ; Kaminsky, G.G. ; Kim, J.M. ; Eom, T.W. ; Park, J.S. ; Lee, Y.P. ; Svetchnikov, V.L. ; Levtchenko, G.G. ; Nikolaenko, Yu.M. ; Khokhlov, V.A.

Тема: Низкотемпературный магнетизм

Інший ID: PACS: 75.20.–g

URI: http://dspace.nbuv.gov.ua/handle/123456789/118488

Посилання: Evidence for non-Dzyaloshinskii–Moriya ferromagnetism in epitaxial BiFeO₃ films / V.G. Prokhorov, G.G. Kaminsky, J.M. Kim, T.W. Eom, J.S. Park, Y.P. Lee, V.L. Svetchnikov, G.G. Levtchenko, Yu.M. Nikolaenko, V.A. Khokhlov // Физика низких температур. — 2011. — Т. 37, № 2. — С. 161–166. — Бібліогр.: 27 назв. — англ.

Підтримка: This work was supported by the NRF/MEST through the Quantum Photonic Science Research Center, Korea. V. Svetchnikov is grateful to the financial support of Netherlands Institute for Metal Research.

Дата: 2011

Завантажень: 394

Evidence for non-Dzyaloshinskii–Moriya ferromagnetism in epitaxial BiFeO₃ films

Анотація:

BiFeO₃ films have been prepared by dc magnetron sputtering on LaAlO₃ (001) single-crystalline substrate. X-ray diffraction analysis and high-resolution electron-microscopy study reveal that the films have a highly coriented orthorhombic crystal structure. It was found that the magnetic properties of the BiFeO₃ films are typical for the ensemble of interacting superparamagnetic clusters rather than for the Dzyaloshinskii–Moriya weak ferromagnet. Appearance of the extrinsic nanoscale superparamagnetic clusters is explained by the oxygen deficiency in certain regions of the film, where the ferromagnetic ordering is realized through the double-exchange mechanism by Zener.

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