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Phys. Rev. B 61, R6463–R6466 (2000)

Finite-size effects in nickel nanowire arrays

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L. Sun and P. C. Searson
Department of Materials Science and Engineering, The Johns Hopkins University, Baltimore, Maryland 21218

C. L. Chien
Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218

Received 11 June 1999; published in the issue dated 1 March 2000

Nickel nanowire arrays with diameters in the range 30–500 nm have been fabricated by electrochemical deposition into nanoporous, single-crystal mica templates, which allow measurements of the magnetic properties of nickel nanowire arrays at high temperatures. The Curie temperature is found to be reduced by as much as 51 K for the 30 nm diameter nanowires. The Curie temperature shift with wire diameter follows the finite-size scaling relation with λ=0.94 and ξ0=22Å.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.61.R6463
DOI:
10.1103/PhysRevB.61.R6463
PACS:
75.30.Kz, 81.15.Pq, 75.50.Cc
 
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