Tailoring the magnetoimpedance effect of NiFe/Ag multilayer
Tailoring the magnetoimpedance effect of NiFe/Ag multilayer
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DOI：
10.1088/0022-3727/43/29/295004
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发表时间：
2010-07-28
影响因子：
3.4
通讯作者：
Sommer, R. L.
中科院分区：
文献类型：
--
作者：
Correa, M. A.;Bohn, F.;Sommer, R. L.
研究了磁控溅射法制备的NiFe/Ag多层（ML）和ML/SiO2/Ag/SiO2/ML多层（SD）铁磁薄膜的磁阻抗（MI）效应。MI测量是用阻抗分析仪在10 MHz至1.8 GHz的宽频率范围内进行的。样品的几何形状是主要负责不同的MI行为，并考虑到整个频率范围内，不同的机制负责MI的变化相关联。对于ML样品，与铁磁共振（FMR）的出现相关的80%的最大值在约1 GHz时达到。对于SD样品，显著的特征是存在两个不同的频率范围，在100 MHz附近具有80%的高MI%值，与皮肤和磁感应效应相关，在1 GHz附近具有120%的高MI %值，与强皮肤和FMR效应相关。
The magnetoimpedance (MI) effect was investigated in NiFe/Ag multilayered (ML) and ML/SiO2/Ag/SiO2/ML structured multilayered (SD) ferromagnetic films grown by magnetron sputtering. The MI measurements were performed with an impedance analyzer over a wide frequency range, from 10 MHz to 1.8 GHz. Sample geometries are mainly responsible for the different MI behaviours and by considering the entire frequency range, distinct mechanisms responsible for MI changes were associated. For the ML sample, a maximum value of 80%, associated with the appearance of ferromagnetic resonance (FMR), was reached at around 1 GHz. For the SD sample, the striking feature is the existence of two distinct frequency ranges with high MI% values of 80% at around 100 MHz, related to the skin and magnetoinductive effects, and of 120% at around 1 GHz, associated with the strong skin and FMR effect.