Magneto-optical current sensor by domain wall motion in orthoferrites

Author

Didosyan, Yuri S. ; Hauser, Hans ; Nicolics, J. ; Barash, V.Y. ; Fulmek, P.L.

Author_Institution

Inst. of Metrol. Service of Gosstand. of Russia, Moscow, Russia

Volume

49

Issue

1

fYear

2000

fDate

2/1/2000 12:00:00 AM

Firstpage

14

Lastpage

18

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

Keywords

Faraday effect; electric current measurement; ferrites; magnetic domain walls; magneto-optical sensors; DC currents; Faraday effect; birefringence effect; boundary between domains; canted ferromagnets; domain wall excitation; domain wall motion; geometrical position; magneto-optical current sensor; opposite magnetizations; optical current measurements; orthoferrites; sensitivity; wide frequency band; Current measurement; Current transformers; Faraday effect; Frequency measurement; Magnetic domain walls; Magnetic sensors; Magnetooptic effects; Optical polarization; Optical sensors; Position measurement;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.836301

Filename

836301