228 0

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
10.1063/1.470944010.1063/1.4709440
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE