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

Journal article (2012)

Authors

VG Prokhorov External organisation

GG Kaminsky External organisation

JM Kim External organisation

YJ Yoo External organisation

YP Lee External organisation

V. Svechnikov QN/High Resolution Electron Microscopy

GG Levchenko External organisation

YM Nikolaenko External organisation

Research Group

QN/High Resolution Electron Microscopy

More Info

expand_more

To reference this document use:

http://resolver.tudelft.nl/uuid:4d1f119c-d8da-44ec-be7e-017c694a77c1

Published Date

2012

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Research Group

QN/High Resolution Electron Microscopy

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.