CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 10357 > Article
Presentation
21 September 2017 Temperature dependence of spin transport properties in Pt (Conference Presentation)
Ryan Freeman, Andrei Zholud, Sergei Urazhdin
Author Affiliations +
Proceedings Volume 10357, Spintronics X; 103572S (2017) https://doi.org/10.1117/12.2276867
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States
Abstract
Despite extensive applications of Pt for spin-charge conversion in spintronics, its spin-dependent transport properties are still debated. We study spin transport in Pt by utilizing current perpendicular-to-plane (CPP) giant magnetoresistance (GMR) in nanoscale Permalloy (Py)-based spin valves with Pt inserted in the nonmagnetic spacer. We will discuss our results for the temperature-dependent spin diffusion length (SDL) of Pt, extracted from the dependence of GMR on the Pt thickness and calculations based on the Valet-Fert model. By comparing samples with Pt sandwiched between Cu spacers and samples where Pt is in direct contact with Py, we determine that the spin relaxation rate at the Pt/Py interface is significantly smaller than at the Pt/Cu interface. We interpret our results in terms of two relevant spin scattering mechanisms: spin flipping due to the orbital scattering (Elliot-Yafet mechanism, EY), and spin precession around the effective spin-orbit field (Dyakonov-Perel mechanism, DP). We argue that DP relaxation is suppressed at Pt/Py interfaces due to the dominance of the proximity-induced effective exchange field. By comparing the SDL as a function of temperature to the mean free path, we show that EY contribution to scattering in the bulk is dominant at temperatures above 150K. We also analyze samples with ultrathin Pt spacer, where scattering at interfaces should be dominant. Temperature dependence of GMR of these samples is consistent with the dominance of DP relaxation. Our results provide a pathway for the optimization of spin scattering and spin/charge current conversion in Pt-based spintronic devices.
Conference Presentation
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Ryan Freeman, Andrei Zholud, and Sergei Urazhdin "Temperature dependence of spin transport properties in Pt (Conference Presentation)", Proc. SPIE 10357, Spintronics X, 103572S (21 September 2017); https://doi.org/10.1117/12.2276867
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 PRESENTATION
WATCH
PRESENTATION SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
KEYWORDS
Platinum
Scattering
Diffusion
Spintronics
Copper
Magnetic semiconductors
Magnetism
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top