A Portable Technique for the Contactless Measurement of Magnetoresistance Using Infrared Fiber Optics

Author

Stanton, Tomas ; Deakin, Tom ; Vopsaroiu, Marian ; Artyushenko, Viacheslav G. ; Thompson, Sarah M.

Author_Institution

Dept. of Phys., York Univ.

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2767

Lastpage

2769

Abstract

A prototype instrument is presented which can quickly and cost-effectively make noncontact measurements of giant magnetoresistance (GMR). The instrument is based on the magnetorefractive effect (MRE) which has previously been shown to be strongly related to GMR in metallic materials. The realization of the instrument exploits mid-to-far infrared transmitting optical fibers which shield the infrared radiation from the environment and enable its efficient focussing. The instrument is tested on a GMR CoFe/Cu multilayer and its response compared to a control sample of Cr

Keywords

cobalt alloys; copper; ferromagnetic materials; giant magnetoresistance; iron alloys; magnetic multilayers; magneto-optical effects; optical fibres; CoFe-Cu; giant magnetoresistance; infrared fiber optics; infrared radiation; magnetorefractive effect; mid-to-far infrared transmitting optical fibers; multilayer; Giant magnetoresistance; Inorganic materials; Instruments; Magnetic materials; Magnetic shielding; Nonhomogeneous media; Optical fibers; Optical materials; Prototypes; Testing; Giant magnetoresistance (GMR); infrared magnetorefractive effect; magnetorefractive effect (MRE); noncontact GMR measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.893310

Filename

4202928