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

Автор(и)

  • V.G. Prokhorov Institute of Metal Physics, NASU, Kiev, 03142 Ukraine
  • Yu.M. Nikolaenko Donetsk Institute for Physics and Technology, NASU, Donetsk, 83114 Ukraine
  • G.G. Levtchenko Donetsk Institute for Physics and Technology, NASU, Donetsk, 83114 Ukraine
  • V.L. Svetchnikov National Center for HREM, TU Delft, 2628AL The Netherlands
  • Y.P. Lee q-Psi and Department of Physics, Hanyang University, Seoul, 133-791 Korea
  • J.S. Park q-Psi and Department of Physics, Hanyang University, Seoul, 133-791 Korea
  • T.W. Eom q-Psi and Department of Physics, Hanyang University, Seoul, 133-791 Korea
  • J.M. Kim q-Psi and Department of Physics, Hanyang University, Seoul, 133-791 Korea
  • G.G. Kaminsky Institute of Metal Physics, NASU, Kiev, 03142 Ukraine
  • V.A. Khokhlov Donetsk Institute for Physics and Technology, NASU, Donetsk, 83114 Ukraine

DOI:

https://doi.org/10.1063/1.3555838

Ключові слова:

multiferroics, Dzyaloshinskii–Moriya ferromagnetism, superparamagnetic clusters.

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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Опубліковано

2010-12-27

Як цитувати

(1)
Prokhorov, V.; Nikolaenko, Y.; Levtchenko, G.; Svetchnikov, V.; Lee, Y.; Park, J.; Eom, T.; Kim, J.; Kaminsky, G.; Khokhlov, V. Evidence for Non-Dzyaloshinskii-Moriya Ferromagnetism in Epitaxial BiFeO3 Films. Fiz. Nizk. Temp. 2010, 37, 161-166.

Номер

Том 37 № 2 (2011)

Розділ

Низькотемпературний магнетизм

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