Evidence of the Griffiths phase in multiferroic BiMnO3 and BiFe0.5Mn0.5O3 films
- Title
- Evidence of the Griffiths phase in multiferroic BiMnO3 and BiFe0.5Mn0.5O3 films
- Author
- 이영백
- Keywords
- bismuth compounds; electron diffraction; electron microscopy; ferromagnetic materials; inclusions; iron compounds; magnetic domains; magnetic thin films; multiferroics; paramagnetic materials
- Issue Date
- 2012-05
- Publisher
- American Institute of Physics, 2012.
- Citation
- LOW TEMPERATURE PHYSICS, Vol.38, No.5 [2012], p413-418
- Abstract
- 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.
- URI
- https://aip.scitation.org/doi/10.1063/1.4709440https://aip.scitation.org/doi/10.1063/1.4709440http://hdl.handle.net/20.500.11754/66919
- ISSN
- 1063-777X; 1063-777X
- DOI
- 10.1063/1.4709440; 10.1063/1.4709440
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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