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

Andrew Horn; V. G. Kravets; D. Bozec; J. A D Matthew; S. M. Thompson

doi:10.1103/PhysRevB.65.054415

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

Andrew Horn
, V. G. Kravets
, D. Bozec
, J. A D Matthew
, S. M. Thompson

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

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.

Original language	English
Article number	054415
Pages (from-to)	544151-544159
Number of pages	8
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

Keywords

Giant magnetoresistance; Magnetooptical effect; Optical refraction (correlation between magnetorefractive effect, giant magnetoresistance, and optical properties of Co-Ag granular magnetic films)

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10.1103/PhysRevB.65.054415

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

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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year = "2002",

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doi = "10.1103/PhysRevB.65.054415",

language = "English",

volume = "65",

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

AU - Horn, Andrew

AU - Kravets, V. G.

AU - Bozec, D.

AU - Matthew, J. A D

AU - Thompson, S. M.

PY - 2002/2/1

Y1 - 2002/2/1

N2 - 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.

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.

KW - Giant magnetoresistance; Magnetooptical effect; Optical refraction (correlation between magnetorefractive effect, giant magnetoresistance, and optical properties of Co-Ag granular magnetic films)

U2 - 10.1103/PhysRevB.65.054415

DO - 10.1103/PhysRevB.65.054415

M3 - Article

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VL - 65

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 5

M1 - 054415

ER -

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

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Keywords

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