Low field anisotropic magnetostriction of single domain exchange-coupled (TbFe/Fe) multilayers
Low field anisotropic magnetostriction of single domain exchange-coupled (TbFe/Fe) multilayers
复制标题
单畴交换耦合 (TbFe/Fe) 多层膜的低场各向异性磁致伸缩
DOI：
10.1063/1.372521
复制
发表时间：
2000
影响因子：
3.2
通讯作者：
P. Pernod
中科院分区：
文献类型：
--
作者：
H. Gall;J. Youssef;F. Socha;N. Tiercelin;V. Preobrazhensky;P. Pernod
迄今为止在交换耦合多层材料（ECML）中报道的巨磁致伸缩（GMS）表现出准各向同性的磁致伸缩行为。本文证明了在低场条件下，离子溅射沉积（TbFe/Fe）n多层膜，在单畴状态下诱导高各向异性GMS的可能性。在偏置场Hd下生长的ECML，沿着大尺寸矩形玻璃基板应用，呈现出与强单轴行为相关的原始磁性和磁弹性（ME）特性。在平行于Hd诱导的易轴的外场H∥饱和后，通过将H∥降低到零（Mr/Ms=1）来保持单畴状态，这解释了为什么增大或减小H∥没有改变磁弹性系数bγ，2。一个不同的行为出现沿硬磁化轴与强变化bγ，2通过增加H∥直到饱和。电磁各向异性是高振幅弯曲和扭转的根源。
Giant magnetostriction (GMS) reported until now in exchange-coupled multilayers (ECML) present quasi-isotropic magnetostrictive behavior. In the present work it is shown the possibility to induce highly anisotropic GMS at low field with the single domain state in (TbFe/Fe)n multilayers when deposited by ion sputtering under a magnetic polarization field Hd. ECML grown under bias field Hd, applied along the large size of rectangular glass substrates present original magnetic and magnetoelastic (ME) properties associated with strong uniaxial behavior. After saturation by an external field H∥ applied parallel to the easy axis induced by Hd, a single domain state is kept by decreasing H∥ down to zero (Mr/Ms=1) which explains why there is no change of the magnetoelastic coefficient bγ,2 by increasing or decreasing H∥. A different behavior arises along the hard magnetization axis with a strong change of bγ,2 by increasing H∥ up to the saturation. ME anisotropy is the origin of high amplitude flexural and torsio...