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Origin of Electric Field Induced Magnetization in Multiferroic HoMnO3



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


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 TSR {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.
Physical Review Letters


Multiferroic, Magnetoelectric coupling, Antiferromagnetic domains, Ferroelectric domains


, B. , Lynn, J. , Laver, M. , , Y. and Cheong, S. (2010), Origin of Electric Field Induced Magnetization in Multiferroic HoMnO<sub>3</sub>, Physical Review Letters, [online], (Accessed June 14, 2024)


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Created April 7, 2010, Updated February 19, 2017