Tailoring magnetostriction and magnetic domains of <100>-oriented Fe80Ga16Al4 alloy by magnetic field annealing
来源期刊：Rare Metals2021年第3期
论文作者：Xin-Lei Wang Yuan Liu Xiang Chen
文章页码：563 - 569
摘 要：Magnetic field annealing（MFA） was used to tailor the magnetostriction and magnetic domains of Fe80Ga16Al4 alloy,and the relationship between the two characteristics was studied.The <100>-oriented alloy was prepared by the directional solidification technique and annealed for 20 min at 700℃ in a magnetic field of 250 mT along a direction 45 ° to the <100> orientation,followed by furnace cooling in the same magnetic field.The magnetostriction along the length direction（λ‖）,the width direction（λ丄） and the saturation magnetostriction（λs） was changed from λ‖=208 × 10-6 and λ丄=-16 × 10-6 of the initial alloy to λ‖≈λ丄≈ 1/2 λs ≈ 112 × 10-6after MFA.The magnetic domain structure,which mainly refers to the number,size,and direction of the domains,was tailored and rearranged by MFA.This rearrangement of the magnetic domain structure resulted in a shift of magnetostrictive properties parallel and perpendicular to the <100> orientation for the Fe80Ga16A14 alloy.This magnetic field annealing method can aid understanding of the relationship between the microscopic magnetic domains and the macroscopic magnetostrictive properties.It can also aid in further tailoring better magnetostrictive properties within magnetostrictive materials to meet the requirements of different application conditions.
Xin-Lei Wang1，Yuan Liu1,2，Xiang Chen1,2
1. School of Materials Science and Engineering,Tsinghua University2. Key Laboratory for Advanced Materials Processing Technology Ministry of Education
摘 要：Magnetic field annealing（MFA） was used to tailor the magnetostriction and magnetic domains of Fe80Ga16Al4 alloy,and the relationship between the two characteristics was studied.The <100>-oriented alloy was prepared by the directional solidification technique and annealed for 20 min at 700℃ in a magnetic field of 250 mT along a direction 45 ° to the <100> orientation,followed by furnace cooling in the same magnetic field.The magnetostriction along the length direction（λ‖）,the width direction（λ丄） and the saturation magnetostriction（λs） was changed from λ‖=208 × 10-6 and λ丄=-16 × 10-6 of the initial alloy to λ‖≈λ丄≈ 1/2 λs ≈ 112 × 10-6after MFA.The magnetic domain structure,which mainly refers to the number,size,and direction of the domains,was tailored and rearranged by MFA.This rearrangement of the magnetic domain structure resulted in a shift of magnetostrictive properties parallel and perpendicular to the <100> orientation for the Fe80Ga16A14 alloy.This magnetic field annealing method can aid understanding of the relationship between the microscopic magnetic domains and the macroscopic magnetostrictive properties.It can also aid in further tailoring better magnetostrictive properties within magnetostrictive materials to meet the requirements of different application conditions.
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