Magnetic properties tailored by inserting ultrathin Cr layer in Gd/Ni80Fe20 film
Magnetic properties tailored by inserting ultrathin Cr layer in Gd/Ni80Fe20 film
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通过在 Gd/Ni80Fe20 薄膜中插入超薄 Cr 层来定制磁性能
DOI：
10.1088/1361-6463/aa879e
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发表时间：
2017-11
期刊：
影响因子：
--
通讯作者：
H R Zhai
中科院分区：
文献类型：
--
作者：
L Sun;X C Zhao;Z X Kou;D M Ban;H L Yuan;E Liu;Y Zhai;H R Zhai
研究了磁控溅射制备的不同铬层厚度的Gd(4 Nm)/Cr2+/(12 Nm)薄膜的磁性能。X射线衍射证明Gd层中存在六方密排(Hcp)(0 0 2)和面心立方(Fcc)(1 1 1)峰共存。磁性测量表明，由于Gd和Py层之间的耦合符号随着振荡，在饱和磁化强度()中出现了类似于RKKY耦合的调制。应变的hcp相，特别是面心立方相导致了较差的磁矩和Gd的饱和，这也可能受到可能的磁死层，界面的混合和可能更渐进的向相邻相的转变的影响。铁磁共振共振场()与微波频率关系的理论拟合得到了有效磁化强度(4)和垂直各向异性常数()，由于界面的增加，它们都通过引入Gd和Cr层而得到增强。有趣的是，随着Cr隔离层厚度的增加，磁阻尼系数()明显减小，由此我们推断，层间耦合引起的自旋-轨道相互作用和Gd/Cr/薄膜界面混合引起的费米能区的电子态密度(DOS)都是主要原因。此外，所有的磁性参数都接近于增加到3 nm的Py薄膜的磁性参数。
The magnetic properties of Gd (4 nm)/Cr ()/(12 nm) films with different thicknesses of Cr layer prepared by magnetron sputtering were investigated. X-ray diffraction proves the coexistence of hexagonal closed-packed (hcp)(0 0 2) and face-centred cubic (fcc)(1 1 1) peaks in the Gd layer. Magnetic measurements show a modulation akin to RKKY coupling in the saturation magnetization () as a result of the coupling sign between Gd and Py layers oscillating with. The strained hcp phase and, in particular, the fcc phase lead to poor magnetic moments and strongly reduced saturation of Gd, which can also be affected by the possible magnetically dead layers, the intermixing at interfaces and a presumably more gradual transition to adjacent phases. Theoretical fittings of the relationship between the ferromagnetic resonance field () and the microwave frequency yield the effective magnetization (4) and perpendicular anisotropy constant (), which are all enhanced by introducing Gd and Cr layers as a result of the increased interfaces. Interestingly, with the increasing thickness of Cr spacer layer, an obvious decrease in the magnetic damping coefficient () is observed, from which we infer that both the spin–orbit interaction due to the interlayer couplings and the electron density of states (DOS) at the Fermi energy(E F) resulting from the intermixing at the interfaces of Gd/Cr/film are the major origins. In addition, all magnetic parameters are approaching to those of a Py film withincreasing to 3 nm.
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影响因子：
3.2
作者：
C. Luo;Yuli Yin;Dong Zhang;Sheng Jiang;J. Yue;Y. Zhai;J. Du;H. Zhai
通讯作者：
C. Luo;Yuli Yin;Dong Zhang;Sheng Jiang;J. Yue;Y. Zhai;J. Du;H. Zhai
影响因子：
8.6
作者：
D. Haskel;G. Srajer;Jonathan Lang;J. Pollmann;C. Nelson;J. Jiang;Sam Bader
通讯作者：
D. Haskel;G. Srajer;Jonathan Lang;J. Pollmann;C. Nelson;J. Jiang;Sam Bader
DOI：
10.1016/0031-9163(66)90238-1
发表时间：
1966-10
期刊：
Physics Letters
影响因子：
--
作者：
V. Kamberský;B. Heinrich;D. Fraítová
通讯作者：
V. Kamberský;B. Heinrich;D. Fraítová
影响因子：
4.5
作者：
E. Shalaan;K. Ehses;H. Schmitt
通讯作者：
E. Shalaan;K. Ehses;H. Schmitt
DOI：
10.1016/0022-5088(73)90060-x
发表时间：
1973-10
期刊：
Journal of The Less Common Metals
影响因子：
--
作者：
B. Bist;O. Srivastava
通讯作者：
B. Bist;O. Srivastava