Ballistic and Diffuse Electron Transport in Nanocontacts of Magnetics

Abstract

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.

arXiv comment7 pages, 2 figures accepted for the publication in JETPL (http://www.jetpletters.ac.ru). Will be published on 25 april 2010

References in corpus (3)

• Spin Transfer Torques
• Thermal Spin-Transfer Torques in Magnetoelectronic Devices
• Current-induced phase transition in ballistic Ni nanocontacts

Cited by in corpus (1)

• Heating of inhomogeneous electron flow in the hydrodynamic regime