HIGH-FREQUENCY MAGNETIC-FIELD SENSORS BASED ON THE FARADAY-EFFECT IN GARNET THICK-FILMS

被引：23

作者：

WOLFE, R ^{[1
]}

GYORGY, EM ^{[1
]}

LIEBERMAN, RA ^{[1
]}

FRATELLO, VJ ^{[1
]}

LICHT, SJ ^{[1
]}

DEETER, MN ^{[1
]}

DAY, GW ^{[1
]}

机构：

[1] NATL INST STAND & TECHNOL,BOULDER,CO 80303

来源：

APPLIED PHYSICS LETTERS | 1992年 / 60卷 / 17期

关键词：

D O I：

10.1063/1.107110

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The Faraday effect in the thick epitaxial films of magnetic garnets of the type used in magneto-optic isolators can be used as the basis for a fiber-optic magnetic field sensor. These films have uniaxial anisotropy perpendicular to the surface and they contain bismuth to enhance the Faraday rotation. The typical magnetic domain pattern of meandering stripes changes in response to an applied field perpendicular to the film and this changes the polarization of infrared light propagating perpendicular to the film. Theory and experiment show that the speed of operation is limited by relaxation or resonance effects to upper frequencies between 10(6) and 10(9) Hz. Maximum sensitivity requires low magnetic moment and large thickness, in conflict with the requirements for high speed.

引用

页码：2048 / 2050

页数：3

共 9 条

[1]

CHIKAZUMI S, 1964, PHYSICS MAGNESIUM, P229

[2] FAST, SENSITIVE MAGNETIC-FIELD SENSORS BASED ON THE FARADAY-EFFECT IN YIG [J].