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Dispersion Of Electric-Field-Induced Faraday Effect In Magnetoelectric Cr2o3, J. Wang, Christian Binek

Christian Binek Publications

The frequency dependence of the electric-field-induced magneto-optical Faraday effect is investigated in the magnetoelectric antiferromagnet chromia. Two electrically induced Faraday signals superimpose in proportion to the linear magnetoelectric susceptibility α and the antiferromagnetic order parameter η. The relative strength of these contributions is determined by the frequency of the probing light and can be tuned between extreme characteristics following the temperature dependence of α or η. The frequency dependence is analyzed in terms of electric dipole transitions of perturbed Cr³⁺ crystal-field states. The results allow us to measure voltage-controlled selection, isothermal switching, and temperature dependence of η in …