Magnetoelasticity of Fe-Si single crystals

TitleMagnetoelasticity of Fe-Si single crystals
Publication TypeJournal Article
Year of Publication2010
AuthorsXing Q, Wu D, Lograsso TA
Journal TitleJournal of Applied Physics
Volume107
Pages09a911
Date Published05/01
ISBN Number0021-8979
Accession NumberISI:000277834300116
Keywordsanisotropy, behavior, elastic-constants, ga alloys, iron, magnetostriction, stability, temperature, x-ray-diffraction
Abstract

The tetragonal magnetostriction constant, (3/2)lambda(100), of Fe-Si single crystals was measured and was found to be structure dependent. Similar to that of Fe-Ge single crystals, (3/2)lambda(100) is positive in the single phase A2 regime, becomes negative in the single phase D0(3) regime, and changes from positive to negative between the two regimes. Short-range order in the A2 regime decreases the magnetostriction prior to the onset of long range order. In the single phase regions of both A2 and D0(3), thermal history does not show any obvious effect on the magnetostriction, contrary to that found for Fe-Ga alloys. However, in the regions of phase mixture involving A2, B2, and D0(3) phases, quenching pushes the change in magnetostriction from positive to negative to higher Si contents. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3353017]

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