Origin of ferroelectric polarization in spiral magnetic structure of MnWO(4)

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Origin of ferroelectric polarization in spiral magnetic structure of MnWO(4)

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Title: Origin of ferroelectric polarization in spiral magnetic structure of MnWO(4)
Author: SHANAVAS, KV; CHOUDHURY, D; DASGUPTA, I; SHARMA, SM; SARMA, DD
Abstract: Magnetism and the origin of ferroelectricity in the multiferroic MnWO(4) are studied using ab initio electronic-structure calculations, correctly reproducing the magnetic ground state. The calculated ferroelectric polarization is in good agreement with experiments. Our results reveal that spin-orbit interaction is necessary and sufficient to explain the observed ferroelectric polarization, establishing an entirely electronic origin of ferroelectricity in MnWO(4). The origin of spin-orbit interaction in this compound with a nominally d(5) L=0 orbitally quenched state is elucidated by analyzing results of x-ray absorption spectroscopy.
URI: http://dx.doi.org/10.1103/PhysRevB.81.212406
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4548
http://hdl.handle.net/10054/4548
Date: 2010


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