Evidence for Griffiths phase in multiferroic BiMnO₃ and BiFe₀.₅Mn₀.₅O₃ films

Evidence for Griffiths phase in multiferroic BiMnO₃ and BiFe₀.₅Mn₀.₅O₃ films

Prokhorov, V.G. ; Kaminsky, G.G. ; Kim, J.M. ; Yoо, Y.J. ; Lee, Y.P. ; Svetchnikov, V.L. ; Levchenko, G.G. ; Nikolaenko, Yu.M. ; Khokhlov, V.A.

Тема: Низкотемпеpатуpный магнетизм

Інший ID: PACS: 68.05.cf , 75.50.Bb, 75.50.Dd, 75.60.Ej

URI: http://dspace.nbuv.gov.ua/handle/123456789/117188

Посилання: Evidence for Griffiths phase in multiferroic BiMnO₃ and BiFe₀.₅Mn₀.₅O₃ films / V.G. Prokhorov, G.G. Kaminsky, J.M. Kim, Y.J. Yoo, Y.P. Lee , V.L. Svetchnikov, G.G. Levchenko, Yu.M. Nikolaenko, V.A. Khokhlov // Физика низких температур. — 2012. — Т. 38, № 5. — С. 531-537. — Бібліогр.: 30 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 the Netherlands Institute for Metal Research.

Дата: 2012

Завантажень: 417

Evidence for Griffiths phase in multiferroic BiMnO₃ and BiFe₀.₅Mn₀.₅O₃ films

Анотація:

Microstructure and magnetic properties of the BiMnO₃ and BiFe₀.₅Mn₀.₅O₃ films, prepared by the rf magnetron sputtering on LaAlO₃ (001) single-crystalline substrate, have been investigated. The selected-area electron diffraction analysis allows us to indentify the crystal structure of the BiMnO₃ film as an orthorhombic one while the BiFe₀.₅Mn₀.₅O₃ film has a hexagonal lattice symmetry. The high-resolution electron microscopy study reveals the presence of strip-domain phase with a periodic spacing of about 3c in both films. The magnetic measurements show that in addition to the basic paramagnetic phase, the films manifest the Griffiths phase behavior in a wide temperature range. We argue that the observed weak ferromagnetism is provided by an appearance of the strip-domain layered inclusions rather than the intrinsic physical origin of the films.

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