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Applied Physics Letters / Volume 96 / Issue 9 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 96, 093108 (2010); http://dx.doi.org/10.1063/1.3350896 (3 pages)

Current-induced phase transition in ballistic Ni nanocontacts

R. G. Gatiyatov, V. N. Lisin, and A. A. Bukharaev

Zavoisky Physical-Technical Institute, RAS, 420029 Kazan, Russia

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(Received 9 November 2009; accepted 11 February 2010; published online 3 March 2010)

Local phase transition from ferromagnetic to paramagnetic state in the region of the ballistic Ni nanocontacts (NCs) has been experimentally observed. We found that contact size reduction leads to an increase in the bias voltage at which the local phase transition occurs. Presented theoretical interpretation of this phenomenon takes into account the specificity of the local heating of the ballistic NC and describes the electron’s energy relaxation dependences on the applied voltage. The experimental data are in good qualitative and quantitative agreement with the theory proposed.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

ballistic transport, ferromagnetic-paramagnetic transitions, heat treatment, nanocontacts, nickel

PACS

  • 75.30.Kz

    Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)

  • 75.40.-s

    Critical-point effects, specific heats, short-range order

  • 73.63.Rt

    Nanoscale contacts

  • 73.23.Ad

    Ballistic transport

  • 81.40.Gh

    Other heat and thermomechanical treatments

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3350896

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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    M. Hatami, G. E. W. Bauer, Q. Zhang, and P. J. Kelly, Phys. Rev. Lett. 99, 066603 (2007).

    M. Rokni and Y. Levinson, Phys. Rev. B 52, 1882 (1995).

    M. R. Sullivan, D. A. Boehm, D. A. Ateya, S. Z. Hua, and H. D. Chopra, Phys. Rev. B 71, 024412 (2005).

    K. Hansen, S. K. Nielsen, M. Brandbyge, E. Lagsgaard, I. Stensgaard, and F. Besenbacher, Appl. Phys. Lett. 77, 708 (2000)APPLAB000077000005000708000001.


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