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A portable technique for the contactless measurement of magnetoresistance using infrared fiber optics

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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
Original languageEnglish
Pages (from-to)2767-2769
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number6
Publication statusPublished - 2007

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