Magnetite (Fe3O4): a new variant of relaxor multiferroic?

The electric polarization, dielectric permittivity, magnetoelectric effect, heat capacity, magnetization and ac susceptibility of magnetite films and polycrystals were investigated. The electric polarization of magnetite films with saturation values between 4 and 8 μC cm(-2) was found to vanish betw...

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Bibliographic Details
Published in:	Journal of physics. Condensed matter Vol. 24; no. 8; p. 086007
Main Authors:	Ziese, M, Esquinazi, P D, Pantel, D, Alexe, M, Nemes, N M, Garcia-Hernández, M
Format:	Journal Article
Language:	English
Published:	England 29.02.2012
ISSN:	1361-648X, 1361-648X
Online Access:	Get more information
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Summary:	The electric polarization, dielectric permittivity, magnetoelectric effect, heat capacity, magnetization and ac susceptibility of magnetite films and polycrystals were investigated. The electric polarization of magnetite films with saturation values between 4 and 8 μC cm(-2) was found to vanish between 32 and 38 K, but in polycrystals no phase transition was detected in this range by heat capacity. Both types of samples showed magnetoelectric effects at low temperatures below a frequency-dependent crossover. This is interpreted as arising from multiferroic relaxor behavior.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1361-648X 1361-648X
DOI:	10.1088/0953-8984/24/8/086007