The influence of localized electronic states on the optical and magneto-optical properties and magnetoresistance in amorphous CoFeNiSiB alloys

V. Kravets; A. Petford-Long; X. Portier; L. Poperenko; M. Kolesnik

doi:10.4028/www.scientific.net/msf.373-376.481

The influence of localized electronic states on the optical and magneto-optical properties and magnetoresistance in amorphous CoFeNiSiB alloys

V. Kravets^*, A. Petford-Long, X. Portier, L. Poperenko, M. Kolesnik

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Conference article › peer-review

Abstract

The optical and magneto-optical properties of amorphous CoFeSiB ribbons were investigated for incident photons in the energy range from 0.05 to 2.2 eV. The Kerr rotation spectra for the amorphous films have a shape in the 0.6 - 2.2 eV region that is quite similar to that of bulk Co. The optical conductivity of the amorphous CoFe(Ni)SiB alloys increases slowly as a function of frequency (proportional to ω^1/3) in the IR. Such a σ∼ω^1/3 dependence in the IR suggests an additional localization of the electron states. A large room-temperature magnetoresistance effect has been demonstrated in thin Co₇₁Fe₇Si₁₂B₁₀ and Co₅₉Fe₅Ni₁₀Si₁₁B₁₅ amorphous ribbons for alternating current at applied fields, H<80 Oe.

Original language	English (US)
Pages (from-to)	481-484
Number of pages	4
Journal	Materials Science Forum
Volume	373-376
DOIs	https://doi.org/10.4028/www.scientific.net/msf.373-376.481
State	Published - 2001
Event	8th European Magnetic Materials and Applications Conference (EMMA 2000) - Kyiv, Ukraine Duration: Jun 7 2000 → Jun 10 2000

Keywords

Amorphous metallic ribbons
Localized electronic states
Magnetoresistance
Optical and magneto-optical properties

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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Cite this

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title = "The influence of localized electronic states on the optical and magneto-optical properties and magnetoresistance in amorphous CoFeNiSiB alloys",

abstract = "The optical and magneto-optical properties of amorphous CoFeSiB ribbons were investigated for incident photons in the energy range from 0.05 to 2.2 eV. The Kerr rotation spectra for the amorphous films have a shape in the 0.6 - 2.2 eV region that is quite similar to that of bulk Co. The optical conductivity of the amorphous CoFe(Ni)SiB alloys increases slowly as a function of frequency (proportional to ω1/3) in the IR. Such a σ∼ω1/3 dependence in the IR suggests an additional localization of the electron states. A large room-temperature magnetoresistance effect has been demonstrated in thin Co71Fe7Si12B10 and Co59Fe5Ni10Si11B15 amorphous ribbons for alternating current at applied fields, H<80 Oe.",

keywords = "Amorphous metallic ribbons, Localized electronic states, Magnetoresistance, Optical and magneto-optical properties",

author = "V. Kravets and A. Petford-Long and X. Portier and L. Poperenko and M. Kolesnik",

year = "2001",

doi = "10.4028/www.scientific.net/msf.373-376.481",

language = "English (US)",

volume = "373-376",

pages = "481--484",

journal = "Materials Science Forum",

issn = "0255-5476",

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TY - JOUR

T1 - The influence of localized electronic states on the optical and magneto-optical properties and magnetoresistance in amorphous CoFeNiSiB alloys

AU - Kravets, V.

AU - Petford-Long, A.

AU - Portier, X.

AU - Poperenko, L.

AU - Kolesnik, M.

PY - 2001

Y1 - 2001

N2 - The optical and magneto-optical properties of amorphous CoFeSiB ribbons were investigated for incident photons in the energy range from 0.05 to 2.2 eV. The Kerr rotation spectra for the amorphous films have a shape in the 0.6 - 2.2 eV region that is quite similar to that of bulk Co. The optical conductivity of the amorphous CoFe(Ni)SiB alloys increases slowly as a function of frequency (proportional to ω1/3) in the IR. Such a σ∼ω1/3 dependence in the IR suggests an additional localization of the electron states. A large room-temperature magnetoresistance effect has been demonstrated in thin Co71Fe7Si12B10 and Co59Fe5Ni10Si11B15 amorphous ribbons for alternating current at applied fields, H<80 Oe.

AB - The optical and magneto-optical properties of amorphous CoFeSiB ribbons were investigated for incident photons in the energy range from 0.05 to 2.2 eV. The Kerr rotation spectra for the amorphous films have a shape in the 0.6 - 2.2 eV region that is quite similar to that of bulk Co. The optical conductivity of the amorphous CoFe(Ni)SiB alloys increases slowly as a function of frequency (proportional to ω1/3) in the IR. Such a σ∼ω1/3 dependence in the IR suggests an additional localization of the electron states. A large room-temperature magnetoresistance effect has been demonstrated in thin Co71Fe7Si12B10 and Co59Fe5Ni10Si11B15 amorphous ribbons for alternating current at applied fields, H<80 Oe.

KW - Amorphous metallic ribbons

KW - Localized electronic states

KW - Magnetoresistance

KW - Optical and magneto-optical properties

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UR - http://www.scopus.com/inward/citedby.url?scp=0035184749&partnerID=8YFLogxK

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DO - 10.4028/www.scientific.net/msf.373-376.481

M3 - Conference article

AN - SCOPUS:0035184749

SN - 0255-5476

VL - 373-376

SP - 481

EP - 484

JO - Materials Science Forum

JF - Materials Science Forum

T2 - 8th European Magnetic Materials and Applications Conference (EMMA 2000)

Y2 - 7 June 2000 through 10 June 2000

ER -

The influence of localized electronic states on the optical and magneto-optical properties and magnetoresistance in amorphous CoFeNiSiB alloys

Abstract

Keywords

ASJC Scopus subject areas

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