Giant magnetoresistance of Fe/In/Fe trilayers

Giant magnetoresistance (GMR) and magnetic properties in Fe/In/Fe trilayers with various In thickness were studied. Negative GMR 0.38% was observed in sample with In thickness 1.05 nm at 20 K. The magnitudes of GMR were found to oscillate with a period about 1.1 nm when varying the thickness of In layers. The GMR of trilayers was near constant at low temperature and decreased linearly with increasing temperature at high temperature.