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

Автор(и)

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

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.4709440

Ключові слова:

multiferroics, thin films, crystal structure, Griffiths phase.

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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Опубліковано

2012-03-16

Як цитувати

(1)
V.G. Prokhorov, G.G. Kaminsky, J.M. Kim, Y.J. Yoo, Y.P. Lee, V.L. Svetchnikov, G.G. Levchenko, Yu.M. Nikolaenko, and V.A. Khokhlov, Evidence for Griffiths phase in multiferroic BiMnO3 and BiFe0.5Mn0.5O3 films, Low Temp. Phys. 38, (2012) [Fiz. Nizk. Temp. 38, 531-537, (2012)] DOI: https://doi.org/10.1063/1.4709440.

Номер

Том 38 № 5 (2012)

Розділ

Низькотемпературний магнетизм

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