Letter abstract


Nature Nanotechnology 2, 216 - 219 (2007)
Published online: 18 March 2007 | doi:10.1038/nnano.2007.64

Subject Categories: Nanomagnetism and spintronics | Organic-inorganic nanostructures

Observation of extremely long spin relaxation times in an organic nanowire spin valve

S. Pramanik1, C.-G. Stefanita1, S. Patibandla1, S. Bandyopadhyay1, K. Garre2, N. Harth2 & M. Cahay2


Organic semiconductors that are π-conjugated are emerging as an important platform for ‘spintronics’, which purports to harness the spin degree of freedom of a charge carrier to store, process and/or communicate information1. Here, we report the study of an organic nanowire spin valve device, 50 nm in diameter, consisting of a trilayer of ferromagnetic cobalt, an organic, Alq3, and ferromagnetic nickel. The measured spin relaxation time in the organic is found to be exceptionally long—between a few milliseconds and a second—and it is relatively temperature independent up to 100 K. Our experimental observations strongly suggest that the primary spin relaxation mechanism in the organic is the Elliott–Yafet mode, in which the spin relaxes whenever a carrier scatters and its velocity changes.

Top
  1. Department of Electrical and Computer Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, USA
  2. Department of Electrical and Computer Engineering, University of Cincinnati, Cincinnati, Ohio 45221, USA

Correspondence to: S. Bandyopadhyay1 e-mail: sbandy@vcu.edu



MORE ARTICLES LIKE THIS

These links to content published by NPG are automatically generated.

REVIEWS

The emergence of spin electronics in data storage

Nature Materials Review (01 Nov 2007)

NEWS AND VIEWS

Organic electronics Memoirs of a spin

Nature Nanotechnology News and Views (01 Apr 2007)

Molecular spintronics The rise of spinterface science

Nature Physics News and Views (01 Aug 2010)

See all 5 matches for News And Views

RESEARCH

Supplementary Information

Nature Materials Article (01 Feb 2009)

Supplementary Information

Nature Materials Article (01 Apr 2010)

See all 30 matches for Research