Growth and in-situ characterization of magnetic anisotropy of epitaxial Fe thin film on ion-sculpted Ag (001) substrate
Growth and in-situ characterization of magnetic anisotropy of epitaxial Fe thin film on ion-sculpted Ag (001) substrate
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离子雕刻Ag（001）衬底上外延Fe薄膜的生长和磁各向异性的原位表征
DOI：
10.1016/j.jmmm.2021.168679
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发表时间：
2022
影响因子：
2.7
通讯作者：
D. Kumar
中科院分区：
文献类型：
--
作者：
A. Bera;Sadhana Singh;Md. Shahid Jamal;Z. Hussain;V. Reddy;D. Kumar
利用反射高能电子衍射和磁光克尔效应研究了离子刻蚀Ag（0 0 1）衬底上Fe薄膜的原位生长和磁性。Fe膜被发现外延生长在Ag表面上，并表现出外延岛的形成，膜厚达1 nm。在沉积Fe膜之前，对衬底表面进行离子束刻蚀，使Fe膜产生单轴磁各向异性，并与bcc-Fe的立方四重各向异性相耦合，导致磁滞回线出现多阶跃。磁开关和它的相关性与域动态的膜，研究的克尔显微镜技术，揭示了一个显着的差异域结构取决于所施加的磁场相对于结晶方向的方向。发现磁化反转是通过扫描180°畴壁的“单步跳跃”机制发生的，而相干旋转和扫描90°畴壁的组合则是“双步跳跃”机制发生的。
Growth and magnetic characterization of Fe film on ion-sculpted Ag(0 0 1) substrate have been studied in-situ using reflection high energy electron diffraction and magneto-optical Kerr effect. Fe film is found to grow epitaxially on the Ag surface and exhibits epitaxial island formation up to ∼ 1 nm film thickness. Ion beam sculpting of the substrate surface, prior to the deposition of the Fe film, induces an uniaxial magnetic anisotropy in Fe film, which couples with the cubic four-fold anisotropy of bcc-Fe, lead to the multiple-step jump in magnetic hysteresis loops. Magnetic switching and its correlation with the domain dynamics of the film, as studied by the Kerr microscopy technique, revealed a striking difference in domain structure depending upon the direction of the applied magnetic field with respect to crystallographic direction. It is found that the magnetization reversal takes place via a “single-step jump” mechanism through sweeping of 180° domain walls, whereas the combination of coherent rotation and the sweeping of 90° domain walls is responsible for a “double step jump” magnetization reversal.
影响因子：
4
作者：
M. Liedke;M. Körner;K. Lenz;F. Grossmann;S. Facsko;J. Fassbender
通讯作者：
M. Liedke;M. Körner;K. Lenz;F. Grossmann;S. Facsko;J. Fassbender