Magnetostatic interaction in multi-shell Ni80Fe20/Cu composite wires
Magnetostatic interaction in multi-shell Ni80Fe20/Cu composite wires
复制标题
多壳 Ni80Fe20/Cu 复合线中的静磁相互作用
DOI：
10.1016/j.jmmm.2018.03.053
复制
发表时间：
2018
影响因子：
2.7
通讯作者：
赵振杰
中科院分区：
文献类型：
--
作者：
吕文星;李欣;赵振杰
由于磁性器件磁性的调制，多层结构材料中的静磁相互作用长期以来一直是优化磁性器件的关键。本研究采用磁控溅射技术制备了多壳Ni80Fe20(tout)/Ni80Fe20(tin)/Cu复合丝。结果表明，多壳复合线的磁滞回线与单壳复合线相比没有出现明显变化。当Ni80Fe20内壳和外壳均具有优选的圆各向异性时，可能会出现四峰结构的GMI轮廓，这表明壳之间存在强偶极相互作用。在这种多壳系统中，偶极子场Hdi对驱动频率的响应与补偿场Hcomp相反。如果内壳具有轴向各向异性结构，则根据相互作用能的消失几乎观察不到偶极子相互作用。所有结果都表明了一种实现更高 GMI 响应的简便方法，以及一种研究复杂复合结构材料中磁相互作用的灵敏方法，特别是在低磁场区域。
Magnetostatic interaction in multilayered structure materials has long been a key to optimize the magnetic devices due to the modulation of their magnetic properties. In this study, the multi-shell Ni80Fe20(tout)/Ni80Fe20(tin)/Cu composite wires were prepared by magnetron sputtering. The results show that the hysteresis loops of the multi-shell composite wires do not present significant changes compared with the single shell composite wire. A four-peak structure GMI profile may appear when both the inner and outer Ni80Fe20shell have a preferred circular anisotropy, which indicated that the strong dipole interactions existed between the shells. In such multi-shell system, the response of dipole fieldHdito the driving frequency is against the compensation fieldHcomp. If the inner shell has axial anisotropy structure, there are almost no dipole interaction observed according to disappearance of the interaction energy. All the results suggest a facile way to achieve a higher GMI response, and a sensitive method, especially in the low magnetic field region, to investigate the magnetic interactions in complicated composite structure materials.