Origin of Electric Field Induced Magnetization in Multiferroic HoMnO3

Published

April 7, 2010

Author(s)

Benjamin Ueland, Jeffrey W. Lynn, Mark Laver, Y. J. Choi, S.-W. Cheong

Abstract

We have performed polarized and unpolarized small angle neutron scattering experiments on single crystals of HoMnO₃ and have found that an increase in magnetic scattering at low momentum transfers begins upon cooling through temperatures close to the spin reorientation transition at T_SR {approximately equal} 40 K. We attribute the increase to an uncompensated magnetization arising within antiferromagnetic domain walls. Polarized neutron scattering experiments performed while applying an electric field show that the field suppresses magnetic scattering below T {approximately equal} 50 K, indicating that the electric field affects the magnetization via the antiferromagnetic domain walls rather than through a change to the bulk magnetic order.

Citation

Physical Review Letters

Volume

104

Issue

14

Pub Type

Journals

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Keywords

Multiferroic, Magnetoelectric coupling, Antiferromagnetic domains, Ferroelectric domains

Citation

, B. , Lynn, J. , Laver, M. , , Y. and Cheong, S. (2010), Origin of Electric Field Induced Magnetization in Multiferroic HoMnO₃, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=903631 (Accessed April 26, 2024)