Infrared reflectance and magnetorefractive effects in metal-insulator CoFe-Al2O3 granular films

D Bozec; V G Kravets; J A D Matthew; S M Thompson; A F Kravets

doi:10.1063/1.1452655

Infrared reflectance and magnetorefractive effects in metal-insulator CoFe-Al2O3 granular films

D Bozec, V G Kravets, J A D Matthew, S M Thompson, A F Kravets

Physics

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

Abstract

The infrared reflectance of (Co50Fe50)(x)-(Al2O3)(1-x) granular films which exhibit tunneling magnetoresistance has been measured in the wavelength range 2-25 mum for compositions both above and below the critical percolation volume fraction. The modifications of the Al2O3 Restrahlen reflection region are well accounted for in an effective medium model. In addition, frequency dependent changes of the reflection have been observed under the application of magnetic fields up to 12 kOe. At the longitudinal optic reflection edge around 9 mum distinctive magnetic signatures are found below and above the percolation threshold phi(c) at x=0.17. (C) 2002 American Institute of Physics.

Original language	English
Pages (from-to)	8795-8797
Number of pages	3
Journal	Journal of Applied Physics
Volume	91
Issue number	10
DOIs	https://doi.org/10.1063/1.1452655
Publication status	Published - 15 May 2002

Keywords

MAGNETORESISTANCE
MODES

Access to Document

10.1063/1.1452655

Cite this

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title = "Infrared reflectance and magnetorefractive effects in metal-insulator CoFe-Al2O3 granular films",

abstract = "The infrared reflectance of (Co50Fe50)(x)-(Al2O3)(1-x) granular films which exhibit tunneling magnetoresistance has been measured in the wavelength range 2-25 mum for compositions both above and below the critical percolation volume fraction. The modifications of the Al2O3 Restrahlen reflection region are well accounted for in an effective medium model. In addition, frequency dependent changes of the reflection have been observed under the application of magnetic fields up to 12 kOe. At the longitudinal optic reflection edge around 9 mum distinctive magnetic signatures are found below and above the percolation threshold phi(c) at x=0.17. (C) 2002 American Institute of Physics.",

keywords = "MAGNETORESISTANCE, MODES",

author = "D Bozec and Kravets, {V G} and Matthew, {J A D} and Thompson, {S M} and Kravets, {A F}",

year = "2002",

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T1 - Infrared reflectance and magnetorefractive effects in metal-insulator CoFe-Al2O3 granular films

AU - Bozec, D

AU - Kravets, V G

AU - Matthew, J A D

AU - Thompson, S M

AU - Kravets, A F

PY - 2002/5/15

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N2 - The infrared reflectance of (Co50Fe50)(x)-(Al2O3)(1-x) granular films which exhibit tunneling magnetoresistance has been measured in the wavelength range 2-25 mum for compositions both above and below the critical percolation volume fraction. The modifications of the Al2O3 Restrahlen reflection region are well accounted for in an effective medium model. In addition, frequency dependent changes of the reflection have been observed under the application of magnetic fields up to 12 kOe. At the longitudinal optic reflection edge around 9 mum distinctive magnetic signatures are found below and above the percolation threshold phi(c) at x=0.17. (C) 2002 American Institute of Physics.

AB - The infrared reflectance of (Co50Fe50)(x)-(Al2O3)(1-x) granular films which exhibit tunneling magnetoresistance has been measured in the wavelength range 2-25 mum for compositions both above and below the critical percolation volume fraction. The modifications of the Al2O3 Restrahlen reflection region are well accounted for in an effective medium model. In addition, frequency dependent changes of the reflection have been observed under the application of magnetic fields up to 12 kOe. At the longitudinal optic reflection edge around 9 mum distinctive magnetic signatures are found below and above the percolation threshold phi(c) at x=0.17. (C) 2002 American Institute of Physics.

KW - MAGNETORESISTANCE

KW - MODES

U2 - 10.1063/1.1452655

DO - 10.1063/1.1452655

M3 - Article

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JO - Journal of Applied Physics

JF - Journal of Applied Physics

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