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Proceedings Paper

Optical magnetic field sensor improved by NdFeB ferromagnetic film
Author(s): Truong Giang Nguyen; Xinbing Jiao; Wenfeng Lei; Yue Ma; Lixin Ma; Bo Qian
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Paper Abstract

In this paper, two types of optical magnetic field sensors have been prepared, one was pure garnet magnetic field sensor, another was garnet with Ta/NdFeB/Ta film grown by magnetron sputtering method at the base pressure of 1.0×10-5Pa, and the working pressure was 0.8Pa. Ta film worked as buffer layer and protective layer, and the NdFeB worked as ferromagnetic film, the atom proportion of NdFeB was 2:14:1. The measuring was based on Magneto-optical Faraday effect. The Faraday rotation was obtained under the conditions of 1.55μm near-infrared light and the magnetic field in range of -150-150Oe. It was found that the garnet sensor with NdFeB film has lower linearity error 0.125% compared with pure garnet sensor 1.42%, and the difference was attributed to the presence of NdFeB ferromagnetic film interact on the garnet.

Paper Details

Date Published: 10 October 2013
PDF: 6 pages
Proc. SPIE 8916, Sixth International Symposium on Precision Mechanical Measurements, 89161P (10 October 2013); doi: 10.1117/12.2035696
Show Author Affiliations
Truong Giang Nguyen, Univ. of Shanghai for Science and Technology (China)
Xinbing Jiao, Univ. of Shanghai for Science and Technology (China)
Wenfeng Lei, Univ. of Shanghai for Science and Technology (China)
Yue Ma, Univ. of Shanghai for Science and Technology (China)
Lixin Ma, Univ. of Shanghai for Science and Technology (China)
Bo Qian, Suzhou Institute of Nano-tech and Nano-bionics (China)


Published in SPIE Proceedings Vol. 8916:
Sixth International Symposium on Precision Mechanical Measurements
Shenghua Ye; Yetai Fei, Editor(s)

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