Evolution of the Spin Hall Effect in Pt Nanowires: Size and Temperature Effects

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Laurent Vila,¹ Takashi Kimura,^1,2 and YoshiChika Otani^1,2
¹Institute for Solid State Physics, University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
²Frontier Research System, RIKEN, Wako, Saitama 351-0198, Japan

Received 28 August 2007; published 29 November 2007

Wehave studied the evolution of the spin Hall effect (SHE)in the regime where the material size responsible for thespin accumulation is either smaller or larger than the spindiffusion length. Lateral spin valve structures with Pt insertions weresuccessfully used to measure the spin absorption efficiency as wellas the spin accumulation in Pt induced through the spinHall effect. Under a constant applied current the results showa decrease of the spin accumulation signal is more pronouncedas the Pt thickness exceeds the spin diffusion length. Thisimplies that the spin accumulation originates from bulk scattering insidethe Pt wire and the spin diffusion length limits theSHE. We have also analyzed the temperature variation of thespin Hall conductivity to identify the dominant scattering mechanism.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.99.226604
DOI:	10.1103/PhysRevLett.99.226604
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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J. E. Hirsch, Phys. Rev. Lett. 83, 1834 (1999).
S. Zhang, Phys. Rev. Lett. 85, 393 (2000).
N. P. Stern, S. Ghosh, G. Xiang, M. Zhu, N. Samarth, and D. D. Awschalom, Phys. Rev. Lett. 97, 126603 (2006).
J. Wunderlich, B. Kaestner, J. Sinova, and T. Jungwirth, Phys. Rev. Lett. 94, 047204 (2005).
T. Kimura, Y. Otani, T. Sato, S. Takahashi, and S. Maekawa, Phys. Rev. Lett. 98, 156601 (2007).
E. Saitoh, M. Ueda, H. Miyajima, and G. Tatara, Appl. Phys. Lett. 88, 182509 (2006).
F. J. Jedema, M. S. Nijboer, A. T. Filip, and B. J. van Wees, Phys. Rev. B 67, 085319 (2003).
T. Kimura, J. Hamrle, and Y. Otani, Phys. Rev. B 72, 014461 (2005).
H. Kurt, R. Loloee, K. Eid, W. P. Pratt, Jr., and J. Bass, Appl. Phys. Lett. 81, 4787 (2002).