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Updated: Dec 18, 2025

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Magnetochiral Dichroism in a Collinear Antiferromagnet with No Magnetization
Tatsuki Sato1, Nobuyuki Abe1, Shojiro Kimura2
1Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8561, Japan.
Abstract:
We show the directional dichroism in a collinear antiferromagnet MnTiO_{3}. The dichroism between two distinctive antiferromagnetic states with opposite signs of staggered magnetic moments can be regarded as magnetochiral dichroism in the absence of external fields. Electric-field reversal of antiferromagnetic domain causes a change in the absorption intensity of unpolarized light around 2.15 eV. The difference in optical absorption between two antiferromagnetic states is reversed for the light propagating in the opposite direction. The absorption coefficient displays a hysteretic behavior for a cycle of sweeping the external electric or magnetic field.
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