1. Control of a polar order via magnetic field in a vector-chiral magnet
- Author
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Andrej Zorko, Martina Dragičević, Helmuth Berger, David Rivas Góngora, Matej Pregelj, Željko Rapljenović, Denis Arčon, Mirta Herak, Damir Altus, Tomislav Ivek, and Vedran Brusar
- Subjects
FOS: Physical sciences ,Inverse ,02 engineering and technology ,01 natural sciences ,spin-stripe phase ,beta-tevo4 ,Condensed Matter::Materials Science ,Condensed Matter - Strongly Correlated Electrons ,0103 physical sciences ,Antiferromagnetism ,features ,010306 general physics ,Physics ,Strongly Correlated Electrons (cond-mat.str-el) ,Condensed matter physics ,Dielectric properties ,Domain walls ,Dzyaloshinskii-Moriya interaction ,Electric polarization ,Ferroelectric domains ,Ferroelectricity ,Frustrated magnetism ,Magnetic phase transitions ,Magnetoelectric effect ,Order (ring theory) ,021001 nanoscience & nanotechnology ,Coupling (probability) ,3. Good health ,Magnetic field ,Magnetic anisotropy ,Polarization density ,Condensed Matter::Strongly Correlated Electrons ,0210 nano-technology - Abstract
Vector-chiral (VC) antiferromagnetism is a spiral-like ordering of spins which may allow ferroelectricity to occur due to loss of space inversion symmetry. In this paper we report direct experimental observation of ferroelectricity in the VC phase of $\beta$-TeVO$_4$, a frustrated spin chain system with pronounced magnetic anisotropy and a rich phase diagram. Saturation polarization is proportional to neutron scattering intensities that correspond to the VC magnetic reflection. This implies that inverse Dzyaloshinskii-Moriya mechanism is responsible for driving electric polarization. Linear magnetoelectric coupling is absent, however an unprecedented dependence of electric coercive field on applied magnetic field reveals a novel way of manipulating multiferroic information., Comment: submitted to PRB Letter, 7 pages, 4 figures
- Published
- 2021