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Effects of hydrogen absorption on magnetism inNi80Fe20/Y/Pdtrilayers
Physical Review B ( IF 3.7 ) Pub Date : 2021-09-22 , DOI: 10.1103/physrevb.104.094429
Charles Weiss 1 , René Hübner 2 , Martin Saunders 3 , Anna Semisalova 2, 4 , Jonathan Ehrler 2 , Nataliia Schmidt 5 , Johannes Seyd 5 , Manfred Albrecht 5 , Shadab Anwar 2, 6 , Jürgen Lindner 2 , Kay Potzger 2 , Mikhail Kostylev 1
Affiliation  

The effects of hydrogen absorption on the effective magnetization (4πMeff), gyromagnetic ratio (γ), Gilbert damping constant (αG), and the inhomogeneous linewidth broadening (ΔH0) in Py(x)/Y(16 nm)/Pd(15 nm) trilayer films (x=2, 3, 5, 8, 10, 20, 40 nm) were investigated with ferromagnetic resonance (FMR), transmission electron microscopy, and vibrating sample magnetometry. In the presence of a hydrogen atmosphere, the samples show a reduction of their FMR linewidth which is found to stem purely from a reduction of the inhomogeneous linewidth broadening. This is attributed to a rearrangement of atoms at the Py/Y interface in the presence of hydrogen, making the Py/Y interface more homogeneous. In addition, a reduction of 4πMeff was seen for all samples in the hydrogen atmosphere which is typical for an increase of the interfacial perpendicular magnetic anisotropy at the Py/Y interface.

中文翻译:

吸氢对Ni80Fe20/Y/Pd三层中磁性的影响

吸氢对有效磁化强度的影响 (4π效果), 旋磁比 (γ), 吉尔伯特阻尼常数 (αG),以及不均匀的线宽加宽 (ΔH0)py(X)/(16 nm)/Pd(15 nm) 三层薄膜 (X=2, 3, 5, 8, 10, 20, 40 nm) 用铁磁共振 (FMR)、透射电子显微镜和振动样品磁强计进行了研究。在氢气气氛中,样品显示出它们的 FMR 线宽减少,这被发现纯粹是由于不均匀线宽加宽的减少。这归因于在氢存在下 Py/Y 界面处原子的重排,使 Py/Y 界面更加均匀。此外,减少4π效果 在氢气氛中观察到所有样品,这是典型的 Py/Y 界面处界面垂直磁各向异性的增加。
更新日期:2021-09-22
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