Ferromagnetism and magneto-transport properties of Mn0.92Ca0.08As thin film grown on Al2O3(0001) substrate

Abstract

Giant magnetocaloric effect of Mn0.92Ba0.08As thin film grown on Al2O3(0001) substrateThe epitaxial Mn 0.92 Ca 0.08 As thin film was grown on Al 2 O 3 (0001) substrate by molecular beam epitaxy. The Curie temperature (T C ) around 340 K was enhanced with the addition of Ca, compared to that of bulk MnAs (T C $ 318 K). The maxima magnetoresistance, $2.08% at 0.7 T, was observed near the critical magnetic transition temperature. Moreover, the giant magnetocaloric effect was found with the maximum magnetic entropy change, $200 J/kgK, around 330 K at 5 T.