CAS Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China.
Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan, 411105, People's Republic of China.
Sci Rep. 2017 Jun 6;7(1):2837. doi: 10.1038/s41598-017-03288-6.
We investigated the magnetic anisotropy and the high-frequency property of flexible FeCoTa (FeCoTa) thin films obtained by oblique sputtering onto a wrinkled surface. The sinuously wrinkled topography is produced by growing Ta layer on a pre-strained polydimethylsiloxane (PDMS) membrane. Due to the enhanced effect of shadowing, the oblique deposition of FeCoTa layer gives rise to a shift of wrinkle peak towards the incident atomic flux. With increasing the PDMS pre-strain or increasing the oblique sputtering angle, both the uniaxial magnetic anisotropy and the ferromagnetic resonance frequency of FeCoTa films are enhanced, but the initial permeability decreases. The magnetization reversal mechanism of wrinkled FeCoTa films can be interpreted by a two-phase model composed of both coherent rotation and domain wall nucleation. With the enhancement of uniaxial magnetic anisotropy, the domain wall nucleation becomes pronounced in FeCoTa films.
我们研究了通过在褶皱表面斜向溅射获得的柔性 FeCoTa（FeCoTa）薄膜的磁各向异性和高频特性。正弦形褶皱形貌是通过在预拉伸聚二甲基硅氧烷（PDMS）膜上生长 Ta 层产生的。由于遮蔽效应的增强，FeCoTa 层的斜向沉积导致褶皱峰向入射原子流偏移。随着 PDMS 预应变的增加或斜向溅射角度的增加，FeCoTa 薄膜的各向异性磁各向异性和铁磁共振频率都得到了增强，但初始磁导率降低了。褶皱 FeCoTa 薄膜的磁化反转机制可以用由相干旋转和畴壁成核组成的两相模型来解释。随着各向异性磁各向异性的增强，FeCoTa 薄膜中的畴壁成核变得明显。
