Paramagnons, weak disorder and positive giant magnetoresistance
Department of Physics, University of Illinois at Urbana-Champaign,
Urbana, IL 61801-3080, USA
Accepted: 13 March 1998
At low temperature and for finite spin scattering in a weakly disordered metal, for a certain value, predicted from our theory, of the material-dependent paramagnon interaction, the total conductivity becomes highly sensitive to the orbital effects of a finite magnetic field. As a consequence, positive giant magnetoresistance and giant corrections to the Hall coefficient arise. We obtain very good agreement between this theory and recent positive giant magnetoresistance experiments.
PACS: 75.70.Pa – Giant magnetoresistance / 72.10.-d – Theory of electronic transport; scattering mechanisms / 72.15.-v – Electronic conduction in metals and alloys
© EDP Sciences, 1998