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

被引：10
|
作者：
Prokhorov, V. G. [1 ]
Kaminsky, G. G. [1 ]
Kim, J. M. [2 ,3 ]
Yoo, Y. J. [2 ,3 ]
Lee, Y. P. [2 ,3 ]
Svetchnikov, V. L. [4 ]
Levchenko, G. G. [5 ]
Nikolaenko, Yu M. [5 ]
Khokhlov, V. A. [5 ]
机构：
[1] NASU, Inst Met Phys, UA-03142 Kiev, Ukraine
[2] Hanyang Univ, Dept Phys, Seoul 133791, South Korea
[3] Hanyang Univ, Q Psi, Seoul 133791, South Korea
[4] Delft Univ Technol, Natl Ctr HREM, NL-2628 AL Delft, Netherlands
[5] NASU, Donetsk Inst Phys & Technol, UA-83114 Donetsk, Ukraine
来源：
LOW TEMPERATURE PHYSICS | 2012年 / 38卷 / 05期
关键词：
FERROMAGNETISM; BEHAVIOR;
D O I：
10.1063/1.4709440
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Microstructure and magnetic properties of BiMnO3 and BiFe0.5Mn0.5O3 films, prepared by rf magnetron sputtering on LaAlO3 (001) single-crystalline substrate, are investigated. The selected-area electron diffraction analysis allows us to identify the crystal structure of the BiMnO3 film as orthorhombic, while the BiFe0.5Mn0.5O3 film has a hexagonal lattice symmetry. High-resolution electron microscopy study reveals the presence of strip-domain phase with a periodic spacing of about 3c in both films. Magnetic measurements show that in addition to the basic paramagnetic phase the films exhibit Griffiths phase behavior in a wide temperature range. We argue that the observed weak ferromagnetism is due to the strip-domain layered inclusions, rather than intrinsic physical origin of the films. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4709440]
引用
收藏
页码：413 / 418
页数：6
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