Giant Magnetoelectric Effect in a Multiferroic Material with a High Ferroelectric Transition Temperature

Details Giant Magnetoelectric Effect in a Multiferroic Material with a High Ferroelectric Transition Temperature Giant Magnetoelectric Effect in a Multiferroic Material with a High Ferroelectric Transition Temperature

2008-05-21

arxiv.org/abs/0805.3289v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

We present a unique example of giant magnetoelectric effect in a conventional multiferroic HoMnO3, where polarization is very large (~56 mC/m2) and the ferroelectric transition temperature is higher than the magnetic ordering temperature by an order. We attribute the uniqueness of the giant magnetoelectric effect to the ferroelectricity induced entirely by the off-center displacement of rare earth ions with large magnetic moments. This finding suggests a new avenue to design multiferroics with large polarization and higher ferroelectric transition temperature as well as large magnetoelectric effects.

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