Correlation between the magnetorefractive effect, giant magnetoresistance, and optical properties of Co-Ag granular magnetic films

V. G. Kravets; D. Bozec; J. A. D. Matthew; S. M. Thompson; H. Menard; A. B. Horn; A. F. Kravets

doi:10.1103/PhysRevB.65.054415

Correlation between the magnetorefractive effect, giant magnetoresistance, and optical properties of Co-Ag granular magnetic films

V. G. Kravets, D. Bozec, J. A. D. Matthew, S. M. Thompson, H. Menard, A. B. Horn, A. F. Kravets

Centre for Anatomy and Human Identification

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61 Citations (Scopus)

Abstract

Giant magnetoresistance (GMR), optical properties, and the infrared magnetorefractive effect (MRE) are studied in reflection for granular films of composition Co_xAg_l-x with x ranging from 0.1 to 0.7. From ellipsometry measurements it is shown that it is necessary to take into account finite-size effects in order to successfully model the optical data demonstrating the importance of the microstructure to the MRE. The ellipsometry data enable the variation in optical properties with Co concentration to be determined and incorporated into a model of the MRE. The MRE itself is calculated with a frequency- and spin-dependent conductivity. Both the experimental and theoretical analyses reveal a correlation between GMR and the MRE demonstrating the feasibility of using the MRE as a contactless method for measuring the GMR and for extracting fundamental spin-dependent scattering parameters.

Original language	English
Article number	054415
Pages (from-to)	544151-544159
Number of pages	9
Journal	Physical Review B: Condensed matter and materials physics
Volume	65
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.65.054415
Publication status	Published - 1 Feb 2002

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Kravets, V. G., Bozec, D., Matthew, J. A. D., Thompson, S. M., Menard, H., Horn, A. B., & Kravets, A. F. (2002). Correlation between the magnetorefractive effect, giant magnetoresistance, and optical properties of Co-Ag granular magnetic films. Physical Review B: Condensed matter and materials physics, 65(5), 544151-544159. Article 054415. https://doi.org/10.1103/PhysRevB.65.054415

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abstract = "Giant magnetoresistance (GMR), optical properties, and the infrared magnetorefractive effect (MRE) are studied in reflection for granular films of composition CoxAgl-x with x ranging from 0.1 to 0.7. From ellipsometry measurements it is shown that it is necessary to take into account finite-size effects in order to successfully model the optical data demonstrating the importance of the microstructure to the MRE. The ellipsometry data enable the variation in optical properties with Co concentration to be determined and incorporated into a model of the MRE. The MRE itself is calculated with a frequency- and spin-dependent conductivity. Both the experimental and theoretical analyses reveal a correlation between GMR and the MRE demonstrating the feasibility of using the MRE as a contactless method for measuring the GMR and for extracting fundamental spin-dependent scattering parameters.",

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Correlation between the magnetorefractive effect, giant magnetoresistance, and optical properties of Co-Ag granular magnetic films. / Kravets, V. G.; Bozec, D.; Matthew, J. A. D. et al.
In: Physical Review B: Condensed matter and materials physics, Vol. 65, No. 5, 054415, 01.02.2002, p. 544151-544159.

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

TY - JOUR

T1 - Correlation between the magnetorefractive effect, giant magnetoresistance, and optical properties of Co-Ag granular magnetic films

AU - Kravets, V. G.

AU - Bozec, D.

AU - Matthew, J. A. D.

AU - Thompson, S. M.

AU - Menard, H.

AU - Horn, A. B.

AU - Kravets, A. F.

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AB - Giant magnetoresistance (GMR), optical properties, and the infrared magnetorefractive effect (MRE) are studied in reflection for granular films of composition CoxAgl-x with x ranging from 0.1 to 0.7. From ellipsometry measurements it is shown that it is necessary to take into account finite-size effects in order to successfully model the optical data demonstrating the importance of the microstructure to the MRE. The ellipsometry data enable the variation in optical properties with Co concentration to be determined and incorporated into a model of the MRE. The MRE itself is calculated with a frequency- and spin-dependent conductivity. Both the experimental and theoretical analyses reveal a correlation between GMR and the MRE demonstrating the feasibility of using the MRE as a contactless method for measuring the GMR and for extracting fundamental spin-dependent scattering parameters.

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JF - Physical Review B: Condensed matter and materials physics

IS - 5

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Correlation between the magnetorefractive effect, giant magnetoresistance, and optical properties of Co-Ag granular magnetic films

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