Omnidirectional zero-field ferromagnetic resonance driven by rotatable anisotropy in FeNi/FeMn bilayers without exchange bias.
Omnidirectional zero-field ferromagnetic resonance driven by rotatable anisotropy in FeNi/FeMn bilayers without exchange bias.
复制标题
无交换偏置的 FeNi/FeMn 双层中可旋转各向异性驱动的全向零场铁磁共振
DOI：
10.1038/s41598-017-01639-x
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发表时间：
2017-05-02
影响因子：
4.6
通讯作者：
Xue D
中科院分区：
文献类型：
--
作者：
Wang W;Chai G;Xue D
本文研究了FeMn/FeNi双层膜的零场GHz频率磁导率谱和可旋转各向异性。可旋转各向异性驱动的全向零场铁磁共振（FMR）可以在无交换偏置的FeMn/FeNi双层中实现。而不是单轴各向异性和交换偏置场，它是可旋转各向异性场占主导地位，在无偏置双层，由于没有交换偏置。通过比较FeNi单层、偏置和无偏置FeMn/FeNi双层的动态和静态磁性能，讨论了交换偏置场、单轴各向异性和可旋转各向异性的定量分析。
In this work, the zero- field GHz frequency permeability spectra and the rotatable anisotropy of FeMn/FeNi bilayers are investigated. Omnidirectional zero-field ferromagnetic resonance (FMR) driven by rotatable anisotropy can be achieved in the FeMn/FeNi bilayers without exchange bias. Instead of uniaxial anisotropy and exchange bias field, it is the rotatable anisotropy field that dominates in the unbiased bilayer, due to the absence of the exchange bias. The quantitative analysis of exchange bias field, uniaxial anisotropy and rotatable anisotropy is discussed by comparing the dynamical and static magnetic properties of FeNi single layer, biased and unbiased FeMn/FeNi bilayers.