Coupled Magnetic and Ferroelectric Domains in Multiferroic Ni3V2O8

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Title: Coupled Magnetic and Ferroelectric Domains in Multiferroic Ni3V2O8
Author: Chen, W.C.; Kenzelmann, M.; Gentile, T.R.; Chen, Y.; Cabrera, I.; Rogado, N.; Lawes, G.; Broholm, C.; Lynn, J.W.; Erwin, R.; Cava, R.J.; Leao, J.B.
Abstract: Electric control of multi-ferroic domains is demonstrated through polarized magnetic neutron diffraction. Cooling to the cycloidal multi-ferroic phase of Ni3V2O8 in an electric field E causes the incommensurate Bragg reflections to become neutron spin polarizing, the sense of neutron polarization reversing with E. Quantitative analysis indicates the E-treated sample has a handedness that can be reversed by E. We further show a close association between cycloidal and ferroelectric domains through E-driven spin and electric polarization hysteresis. We suggest that a definite cycloidal handedness is achieved through magneto-elastically induced Dzyaloshinskii-Moriya interactions.
Date: 2009-08-21
Citation: Physical Review Letters 21 Aug. 2009, vol.103, no.8, 087201 (4 pp.
Subject: cycloidal multiferroic phase
incommensurate Bragg reflections
neutron spin polarization
quantitative analysis
polarized magnetic neutron diffraction
nickel compounds
neutron diffraction
spin polarization hysteresis
electric polarization hysteresis
cycloidal handedness
magnetoelastic effects
magnetic domains
electron spin polarisation
magnetoelastically induced Dzyaloshinskii-Moriya interactions

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