Large Spin Accumulation in a Permalloy-Silver Lateral Spin Valve

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T. Kimura and Y. Otani
Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
RIKEN FRS, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan

Received 11 August 2007; published 9 November 2007

Alarge spin accumulation due to the electrical spin injection hasbeen observed in Permalloy-silver lateral spin-valve structures. The observed resistancechange is the largest among the reported metallic lateral spinvalves with Ohmic junctions. The spin-diffusion length deduced from theexperimental results is also found to be the longest amongthe normal metals reported so far. All the results canbe quantitatively explained by the common spin-diffusion model without anydiscrepancies unlike the results of Godfrey and Johnson.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.99.196604
DOI:	10.1103/PhysRevLett.99.196604
PACS:	72.25.Ba; 72.25.Mk; 75.70.Cn; 75.75.+a 72.25.Ba Spin polarized transport in metals 72.25.Mk Spin transport through interfaces 75.70.Cn Magnetic properties of interfaces (multilayers, superlattices, heterostructures) 75.75.+a Magnetic properties of nanostructures YEAR: 2007

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