Wiedemann effect of Fe–Ga based magnetostrictive wires

doi:10.1088/1674-1056/21/8/087501

Abstract (Fe₈₃Ga₁₇)₉₈Cr₂ wires each with a diameter of 0.7 mm are prepared by hot swaging and warm drawing from the casting rods directly, because the ductility of Fe₈₃Ga₁₇alloy is improved by adding Cr element. The Wiedemann twists and dependences on magnetostrictions of Fe₈₃Ga₁₇ and (Fe₈₃Ga₁₇)₉₈Cr₂ wires are investigated. The largest observed Wiedemann twists of 245 s·cm^-1 and 182 s·cm^-1 are detected in the annealed Fe₈₃Ga₁₇ and (Fe₈₃Ga₁₇)₉₈Cr₂ wires, respectively. The magnetostrictions of the annealed Fe₈₃Ga₁₇ and (Fe₈₃Ga₁₇)₉₈Cr₂ wires are 160 ppm and 107 ppm, respectively. The maximum of Wiedemann twist increases with magnetostriction increasing. However the magnetostriction is just an important factor that affects the Wiedemann effect of alloy wire, and the relationship between magnetostriction and Wiedemann effect is a complex function rather than a simple function.

Keywords: Fe-Ga alloy wires Wiedemann effect magnetostriction

Received: 04 December 2011
Revised: 31 December 2011
Accepted manuscript online:

PACS:	75.20.En	(Metals and alloys)
	75.80.+q	(Magnetomechanical effects, magnetostriction)
	81.40.Lm	(Deformation, plasticity, and creep)
	81.40.Rs	(Electrical and magnetic properties related to treatment conditions)

Fund: Project supported by the State Key Development Program for Basic Research of China (Grant No. 2011CB606304), the National Natural Science Foundation for Postdoctoral Scientists of China (Grant No. 2011M500229), and the Program for New Century Excellent Talents in University, China (Grant No. NCET-09-02120).

Corresponding Authors: Gao Xue-Xu
E-mail: gaox@skl.ustb.edu.cn

Cite this article:

Li Ji-Heng (李纪恒), Gao Xue-Xu (高学绪), Zhu Jie (朱洁), Bao Xiao-Qian (包小倩), Cheng Liang (程亮), Xie Jian-Xin (谢建新 ) Wiedemann effect of Fe–Ga based magnetostrictive wires 2012 Chin. Phys. B 21 087501

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Wiedemann effect of Fe–Ga based magnetostrictive wires

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