Anisotropic magnetic damping studies in β-Ta/2D-epitaxial-Py bilayers

被引：3

作者：

Behera, Nilamani ^{[1
]}

Kumar, Ankit ^{[1
,2
]}

Pandya, Dinesh K. ^{[1
]}

Chaudhary, Sujeet ^{[1
]}

机构：

[1] Indian Inst Technol Delhi, Dept Phys, Thin Film Lab, New Delhi 110016, India

[2] Uppsala Univ, Dept Engn Sci, Box 534, SE-75121 Uppsala, Sweden

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2017年 / 444卷

关键词：

FERROMAGNETIC-RESONANCE; EXTRINSIC CONTRIBUTIONS; TEMPERATURE; RELAXATION;

D O I：

10.1016/j.jmmm.2017.08.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the anisotropy of the effective damping (alpha(eff)) in the sputtered beta-Ta(6 nm)/2D-epitaxial-Py (t(Py) = 3-10 nm) bilayers. In-plane field orientation dependent FMR measurements revealed a prominent anisotropy in alpha(eff), which is ascribed to the spin wave induced spin pumping from Py to beta-Ta in beta-Ta/epi-Py system. The results especially suggest that at lower t(Py) a relatively larger alpha(eff) and its anisotropic nature are present in beta-Ta/epi-Py bilayers as compared to bare epi-Py, which are unlikely at higher t(Py). This is possibly due to both spin pumping which stems from in-plane spin waves associated with two magnon scattering mechanism and interface induced anisotropy from heavy metals like beta-Ta at beta-Ta/Py interface. The in-plane H-r vs. phi reveals clear anisotropy behavior at t(Py) <= 4 nm. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：256 / 262

页数：7

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