On the multiferroic and magnetoelectric nature of GaFeO3, AlFeO3 and related oxides

Details On the multiferroic and magnetoelectric nature of GaFeO3, AlFeO3 and related oxides On the multiferroic and magnetoelectric nature of GaFeO3, AlFeO3 and related oxides

2011-12-26

arxiv.org/abs/1112.5848v1

Physics

Condensed Matter

Materials Science

15 pages,4 figures

Scientific paper

GaFeO3, AlFeO3 and related oxides are known to be ferrimagnetic exhibiting magnetodielectric effect. There has been no evidence to date for the occurrence of ferroelectricity and hence multiferroicity in these oxides. We have investigated these oxides for possible ferroelectricity by carrying out pyroelectric measurements. These measurements establish the occurrence of ferroelectricity at low temperatures below the \'Neel temperature in these oxides. They also exhibit significant magnetoelectric effect. We have tried to understand the origin of ferroelectricity based on symmetry arguments and first-principles calculations.

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