We report a systematic study of effects of temperature and current density on magnetization reversal of thin Ni films and arrays of nanoscopic Co clusters embedded in Pt matrix, in search of mechanisms stimulating magnetization reversal which are not related to spin polarization or to Joule heating by passing current. Reduction in coercive field with current density in Co/Pt can be consistently explained by Joule heating. On contrary, in Ni films we have identified a number of features inconsistent with the "thermal-only" scenario that can be considered as evidence of destabilization of magnetization by unpolarized electric current.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - 8 Oct 2010|