Magneto-optical current sensor by domain wall motion inorthoferrites |
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Authors: | Didosyan YS Hauser H Nicolics J Barash VY Fulmek PL |
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Affiliation: | Inst. of Metrol. Service of Gosstand. of Russia, Moscow; |
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Abstract: | A brief review of the latest developments on optical current measurements based on the Faraday effect is presented. In all existing magneto-optical current transformers, the main measured parameter is the polarization state of the light transmitted by a sensor element. A new transformer is described by means of new results concerning the domain wall excitation. The measured parameter is the geometrical position of the boundary between domains with opposite magnetizations. In a wide frequency band, including DC currents, the measurement results are a linear function of the measured current. They are not affected by temperature changes and mechanical factors |
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