ENHANCED TEMPERATURE EFFECT ON MAGNETORESISTANCE IN FE MO MULTILAYERS/

We have observed an enhancement of the temperature effect on magnetore sistance (MR) in Fe/Mo multilayers with the increase of the Mo layer t hickness. MR at the first antiferromagnetic maximum is large and insen sitive to the temperature whereas at the third antiferromagnetic maxim um it is small and relatively sensitive to the temperature. We found t hat the mean free path of the conduction electrons increased with the increase of the Mo layer thickness at a fixed temperature and it decre ased very slightly with the increase of the temperature at a fixed Mo layer thickness, The interlayer coupling, similar to MR, also has an e nhanced temperature effect with the increase of the Mo layer thickness . There is a scaling relationship between the temperature effect on sa turation field H-s and MR, which suggests that the decrease of the int erlayer coupling strength is responsible for the enhanced temperature effect on MR. (C) 1997 American Institute of Physics.