Crystalline Orientation–Dependent Spin Hall Effect in Epitaxial Platinum

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

doi:10.3389/fphy.2021.791736

Frontiers in Physics (Jan 2022)

Crystalline Orientation–Dependent Spin Hall Effect in Epitaxial Platinum

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

Affiliations

Yuxuan Xiao: Center for Memory and Recording Research, University of California San Diego, San Diego, CA, United States
Hailong Wang: Center for Memory and Recording Research, University of California San Diego, San Diego, CA, United States
Eric E. Fullerton: Center for Memory and Recording Research, University of California San Diego, San Diego, CA, United States
Eric E. Fullerton: Department of Electrical and Computer Engineering, University of California San Diego, San Diego, CA, United States

DOI: https://doi.org/10.3389/fphy.2021.791736
Journal volume & issue: Vol. 9

Abstract

Read online

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.

Published in Frontiers in Physics

ISSN: 2296-424X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Physics
Website: https://www.frontiersin.org/journals/physics

About the journal

Abstract

Keywords