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Updated: May 27, 2026

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Magnetic field dependence of the circular dichroism in EuTe
A B Henriques1, G D Galgano, B L Díaz
1Instituto de Física, Universidade de São Paulo, Caixa Postal 66318, 05315-970 São Paulo, Brazil.
Abstract:
The absorption magnetic circular dichroism in EuTe was investigated as a function of the magnetic field at T = 2 K. In order to describe the optical spectra theoretically, we developed a model that takes into account the magnetic order of the lattice as a function of the magnetic field. The model allows us to calculate the absorption spectrum as a continuous function of the magnetic field intensity. The theory accounts for the strongly dichroic absorption seen at high fields, and for its continuous evolution towards the B = 0 spectrum, which is described by a much weaker and much broader absorption line. The drastic changes observed in the experimental spectra as a function of magnetic field are fully explained by the dependence of the Eu(2+) spin arrangement on the external magnetic field.
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