Giant magnetoresistance in La↓(0.8)Sr↓(0.2)Fe↓(x)Co↓(1-x)O↓(3)(0.025≤X≤0.3)

摘要

The electrical resistance and magnetoresistance of La↓(0.8)Sr↓(0.2)Fe(x)Co↓(1-x)O3 (0.025≤X≤0.3) have been studied at low temperatures down to 1.5 K and magnetic fields up .to 7.5 T. The large magnetoresistance at high and low temperature has been found. The magnetoresistance exhibits a broad minima in the temperature interval between 150 and 50 K for all the compositions. The large magnetoresistance and its broad minima may be interpreted as the interplay of spin state transition. Jahn-Teller distortion, and orbital ordering of Co ions. #1997 American Institute of Physics. S0003 -6951 (97)00547 -0