Ballistic and Diffuse Electron Transport in Nanocontacts of Magnetics

Details Ballistic and Diffuse Electron Transport in Nanocontacts of Magnetics Ballistic and Diffuse Electron Transport in Nanocontacts of Magnetics

2010-03-31

arxiv.org/abs/1003.5990v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 2 figures accepted for the publication in JETPL (http://www.jetpletters.ac.ru). Will be published on 25 april 2010

Scientific paper

The transition from the ballistic electron transport to the diffuse one is experimentally observed in the study of the magnetic phase transition in Ni nanocontacts with different sizes. It is shown that the voltage $U_C$ needed for Joule heating of the near-contact region to the critical temperature does not depend on the contact size only in the diffuse mode. For the ballistic contact it increases with decrease in the nanocontact size. The reduction of the transport electron mean free path due to heating of NCs may result in change of the electron transport mode from ballistic to diffusive one.

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