Thickness dependence of unidirectional spin-Hall magnetoresistance in metallic bilayers
- Thickness dependence of unidirectional spin-Hall magnetoresistance in metallic bilayers
- 한동수; Yuxiang Yin; Mark CH de Jong; Reinoud Lavrijsen; Rembert A Duine; Henk JM Swagten; Bert Koopmans
- Issue Date
- Applied physics letters
- VOL 111, NO 23, 232405
- A nonlinear magnetoresistance-called unidirectional spin-Hall magnetoresistance-is recently experimentally discovered in metallic bilayers consisting of a heavy metal and a ferromagnetic metal. To study the fundamental mechanism of unidirectional spin-Hall magnetoresistance (USMR), both ferromagnetic and heavy metallic layer thickness dependence of the USMR are presented in a Pt/Co/AlOx trilayer at room temperature. To avoid ambiguities, second harmonic Hall measurements are used for separating spin-Hall and thermal contributions to the non-linear magnetoresistance. The experimental results are fitted by using a drift-diffusion theory, with parameters extracted from an analysis of longitudinal resistivity of the Co layer within the framework of the Fuchs-Sondheimer model. A good agreement with the theory is found, demonstrating that the USMR is governed by both the spin-Hall effect in the heavy metallic layer and the metallic diffusion process in the ferromagnetic layer. Published by AIP Publishing.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.