Dependence of magnetic susceptibility on stress in textured polycrystalline Fe81.6Ga18.4 and Fe79.1Ga20.9 Galfenol alloys

被引：53
作者：
Mahadevan, A. [1 ]
Evans, P. G. [1 ]
Dapino, M. J. [1 ]
机构：
[1] Ohio State Univ, Dept Mech Engn, Columbus, OH 43210 USA
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 01期
关键词：
compressibility; gallium alloys; iron alloys; magnetic anisotropy; magnetic domain walls; magnetic susceptibility; magnetostriction; stress effects; tensile strength; texture; GA-AL ALLOYS; FE-GA;
D O I：
10.1063/1.3280374
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Magnetization and magnetostriction measurements in constant tension and compression as a function of applied magnetic field are reported for << 100 >> oriented, textured polycrystalline Fe81.6Ga18.4 and Fe79.1Ga20.9 Galfenol alloys. The susceptibility change with stress, or sensitivity, is maximum at zero field for both alloys. The greatest sensitivity is observed for the 18.4 at. % Ga alloy between -10 and +20 MPa, where domain wall motion dominates. The sensitivity is greater for the 20.9 at. % Ga alloy than for the 18.4 at. % Ga alloy below -15 MPa (domain rotation region). The difference in behavior is attributed to a difference in the anisotropy coefficient.
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