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Anisotropic magnetic damping studies in β-Ta/2D-epitaxial-Py bilayers
Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India.
Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India.
2017 (English)In: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, E-ISSN 1873-4766, Vol. 444, p. 256-262Article in journal (Refereed) Published
Abstract [en]

We report on the anisotropy of the effective damping (αeff) in the sputtered β-Ta(6 nm)/2D-epitaxial-Py(tPy = 3–10 nm) bilayers. In-plane field orientation dependent FMR measurements revealed a prominent anisotropy in αeff, which is ascribed to the spin wave induced spin pumping from Py to β-Ta in β-Ta/epi-Py system. The results especially suggest that at lower tPy a relatively larger αeff and its anisotropic nature are present in β-Ta/epi-Py bilayers as compared to bare epi-Py, which are unlikely at higher tPy. 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 β-Ta at β-Ta/Py interface. The in-plane Hr vs. φ reveals clear anisotropy behavior at tPy ≤ 4 nm.

Place, publisher, year, edition, pages
2017. Vol. 444, p. 256-262
National Category
Condensed Matter Physics Materials Engineering
Identifiers
URN: urn:nbn:se:uu:diva-332476DOI: 10.1016/j.jmmm.2017.08.031ISI: 000413147400040OAI: oai:DiVA.org:uu-332476DiVA, id: diva2:1153186
Available from: 2017-10-27 Created: 2017-10-27 Last updated: 2018-01-26Bibliographically approved

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Kumar, Ankit

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