Magnetostriction and magnetic heterogeneities in iron-gallium

Magnetostriction and magnetic heterogeneities in iron-gallium

Iron-gallium alloys Fe(1-x)Ga(x) exhibit an exceptional increase in magnetostriction with gallium content. We present small-angle neutron scattering investigations on a Fe(0.81)Ga(0.19) single crystal. We uncover heterogeneities with an average spacing of 15 nm and with magnetizations distinct from...

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Veröffentlicht in:Physical review letters 2010-07, Vol.105 (2), p.027202-027202, Article 027202
Hauptverfasser: Laver, M, Mudivarthi, C, Cullen, J R, Flatau, A B, Chen, W-C, Watson, S M, Wuttig, M
Format: Artikel
Sprache:eng
Schlagworte:
ALLOYS
COHERENT SCATTERING
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALS
DIFFRACTION
ELEMENTS
GALLIUM
GALLIUM ALLOYS
IRON
MAGNETIC FIELDS
MAGNETIZATION
MATERIALS
MATERIALS SCIENCE
MATRIX MATERIALS
METALS
MONOCRYSTALS
NANOSTRUCTURES
NEUTRON DIFFRACTION
SCATTERING
SMALL ANGLE SCATTERING
STRAINS
TRANSITION ELEMENTS
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Zusammenfassung:Iron-gallium alloys Fe(1-x)Ga(x) exhibit an exceptional increase in magnetostriction with gallium content. We present small-angle neutron scattering investigations on a Fe(0.81)Ga(0.19) single crystal. We uncover heterogeneities with an average spacing of 15 nm and with magnetizations distinct from the matrix. The moments in and around the heterogeneities are observed to reorient with an applied magnetic field or mechanical strain. We discuss the possible roles played by nanoscale magnetic heterogeneities in the mechanism for magnetostriction in this material.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.105.027202