Crystalline Orientation–Dependent Spin Hall Effect in Epitaxial Platinum

Xiao, Yuxuan; Wang, Hailong; Fullerton, Eric E.

doi:10.3389/fphy.2021.791736

Crystalline Orientation–Dependent Spin Hall Effect in Epitaxial Platinum

Journal Article · Wed Jan 05 00:00:00 EST 2022 · Frontiers in Physics

DOI:https://doi.org/10.3389/fphy.2021.791736· OSTI ID:1838379

Xiao, Yuxuan; Wang, Hailong; Fullerton, Eric E.

We report on the spin Hall effect in epitaxial Pt films with well-defined crystalline (200), (220), and (111) orientations and smooth surfaces. The magnitude of the spin Hall effect has been determined by spin–torque ferromagnetic resonance measurements on epitaxial Pt/Py heterostructures. We observed a 54% enhancement of the charge-to-spin conversion efficiency of the epitaxial Pt when currents are applied along the in-plane $< 002 >$ direction. Temperature-dependent harmonic measurements on epitaxial Pt/Co/Ni heterostructures compared to a polycrystalline Pt/Co/Ni suggest the extrinsic mechanism underlying spin Hall effect in epitaxial Pt. Our work contributes to the development of energy-efficient spintronic devices by engineering the crystalline anisotropy of non-magnetic metals.

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Research Organization:: University of California, San Diego, CA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC): National Science Foundation (NSF)

Grant/Contract Number:: SC0019273

OSTI ID:: 1838379

Alternate ID(s):: OSTI ID: 1981091

Journal Information:: Frontiers in Physics, Journal Name: Frontiers in Physics Vol. 9; ISSN 2296-424X

Publisher:: Frontiers Media SACopyright Statement

Country of Publication:: Switzerland

Language:: English

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