A new experimental design for noncontact giant magnetoresistance measurements using the magnetorefractive effect

M Vopsaroiu; J A D Matthew; S M Thompson

doi:10.1063/1.1790554

A new experimental design for noncontact giant magnetoresistance measurements using the magnetorefractive effect

M Vopsaroiu, J A D Matthew, S M Thompson

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Electrical magnetoresistance measurements of spin dependent materials or devices are very difficult without surface damaging or sample contamination, especially for thin-film giant magnetoresistance (GMR) multilayers. Moreover, the in situ determination of the GMR profile is almost impossible using electrical measurements. We propose a novel experimental design that allows the convenient measurement of magnetoresistance profiles using a noncontact method based on the magnetorefractive effect. This technique is applicable to metallic samples or devices showing magnetotransport properties and is also suitable for in situ measurements. The experiment involves infrared (IR) reflectivity measurements as a function of the applied magnetic field. By introducing IR optical fibers, the experimental setup has been substantially simplified while the need for costly optical components and time consuming alignments has been eliminated. Theoretical simulations of this experiment are also presented prior to the introduction of the proposed design. (C) 2004 American Institute of Physics.

Original language	English
Pages (from-to)	3127-3130
Number of pages	4
Journal	Review of Scientific Instruments
Volume	75
Issue number	10
DOIs	https://doi.org/10.1063/1.1790554
Publication status	Published - Oct 2004

Keywords

GRANULAR FILMS

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10.1063/1.1790554

Cite this

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title = "A new experimental design for noncontact giant magnetoresistance measurements using the magnetorefractive effect",

abstract = "Electrical magnetoresistance measurements of spin dependent materials or devices are very difficult without surface damaging or sample contamination, especially for thin-film giant magnetoresistance (GMR) multilayers. Moreover, the in situ determination of the GMR profile is almost impossible using electrical measurements. We propose a novel experimental design that allows the convenient measurement of magnetoresistance profiles using a noncontact method based on the magnetorefractive effect. This technique is applicable to metallic samples or devices showing magnetotransport properties and is also suitable for in situ measurements. The experiment involves infrared (IR) reflectivity measurements as a function of the applied magnetic field. By introducing IR optical fibers, the experimental setup has been substantially simplified while the need for costly optical components and time consuming alignments has been eliminated. Theoretical simulations of this experiment are also presented prior to the introduction of the proposed design. (C) 2004 American Institute of Physics.",

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