Experimental evidences of a large extrinsic spin Hall effect in AuW alloy

We report an experimental study of a gold-tungsten alloy (7 at. % W concentration in Au host) displaying remarkable properties for spintronics applications using both magneto-transport in lateral spin valve devices and spin-pumping with inverse spin Hall effect experiments. A very large spin Hall an...

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Bibliographic Details
Published in:Applied physics letters 2014-04, Vol.104 (14)
Main Authors: Laczkowski, P., Rojas-Sánchez, J.-C., Savero-Torres, W., Jaffrès, H., Reyren, N., Deranlot, C., Notin, L., Beigné, C., Marty, A., Attané, J.-P., Vila, L., George, J.-M., Fert, A.
Format: Article
Language:English
Subjects:
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Condensed Matter
Damping
DIFFUSION LENGTH
Electromagnetism
GOLD
HALL EFFECT
Lateral stability
Magnetic properties
Materials Science
Organic chemistry
Physics
SPIN
Spin valves
Spintronics
TUNGSTEN ALLOYS
Tungsten base alloys
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Summary:We report an experimental study of a gold-tungsten alloy (7 at. % W concentration in Au host) displaying remarkable properties for spintronics applications using both magneto-transport in lateral spin valve devices and spin-pumping with inverse spin Hall effect experiments. A very large spin Hall angle of about 10% is consistently found using both techniques with the reliable spin diffusion length of 2 nm estimated by the spin sink experiments in the lateral spin valves. With its chemical stability, high resistivity, and small induced damping, this AuW alloy may find applications in the nearest future.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4870835