THE INFLUENCE OF ANNEALING ON TEMPERATURE DEPENDENCIES OF THE MAGNETORESISTIVITY AND RESISTIVITY OF FE CR MULTILAYERS/

Using the thermal treatment for adjusting the giant magnetoresistivity (GMR) values in Fe(3 nm)/Cr(1.1 nm) multilayers, the temperature depe ndencies of resistivity and magnetoresistivity were examined. A reduct ion of the residual resistivities after the annealing processes at ann ealing temperatures lower than 300 degrees C was observed and simultan eously an increase of the magnetoresistivity was noted. Further anneal ing at higher temperatures degraded gradually the magnetoresistivity. Transport properties were found to be affected by two scattering mecha nisms: electron-magnon scattering was dominant for the multilayers exh ibiting higher GMR whereas electron-phonon scattering was more pronoun ced in samples with lower GMR.