Magnetostriction under high prestress in Fe81Ga19 crystal
Magnetostriction under high prestress in Fe81Ga19 crystal
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DOI：
10.1063/1.3456502
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发表时间：
2010-08
影响因子：
3.2
通讯作者：
Jinghua Liu;Zhibin Wang;Chengbao Jiang;Huibin Xu
中科院分区：
文献类型：
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作者：
Jinghua Liu;Zhibin Wang;Chengbao Jiang;Huibin Xu
近年来，寻找可能在高负载下应用的高精度执行器和传感器材料仍然很活跃。研究了高压缩预应力下 Fe81Ga19 合金的磁致伸缩性能、磁致伸缩饱和场 HS 和变磁系数 d33。在高达 431 MPa 的高压缩预应力下，⟨001⟩ 取向的 Fe81Ga19 多晶棒中测得的饱和磁致伸缩保持在 300 ppm 以上。在 HS 和 d33 相对于压缩预应力 σ 绘制的曲线中观察到两阶段现象。模拟了不同压缩预应力下的磁畴旋转路径和磁致伸缩，这有助于深入了解测试的磁致伸缩。基于模拟，建立了Fe-Ga⟨001⟩取向晶体的HS-σ和d33-σ数学方程，揭示了两种机制，满足实验数据提出的函数。高预应力下的高磁致伸缩和低饱和场表明 Fe-Ga 合金...
Seeking high precision actuator and transducer materials potentially applied under high load remains active in recent years. Magnetostrictive property, magnetostriction saturation field HS, and pizeomagnetic coefficient d33 are investigated in Fe81Ga19 alloy under high compressive prestress. The measured saturation magnetostriction remains above 300 ppm in the ⟨001⟩ oriented Fe81Ga19 polycrystalline rod under high compressive prestress up to 431 MPa. Two-stage phenomenon was observed in curves plotted for HS and d33 against compressive prestress σ. The domain rotation path and magnetostriction under different compressive prestress are simulated, and this helps to deeply understand the tested magnetostriction. Based on the simulation, the mathematical equations of HS-σ and d33-σ were established for Fe–Ga ⟨001⟩ oriented crystal revealed two mechanisms, which satisfy proposed functions of experimental data. The high magnetostriction and low saturation field under high prestress indicate that Fe–Ga alloy is ...