%0 Journal Article %A K Ghosh %A S.B Ogale %A S.P Pai %A M Robson %A E Li %A I Jin %A Z.-W Dong %A R.L Greene %A Ramamoorthy Ramesh %A T Venkatesan %A M Johnson %B Applied Physics Letters %D 1998 %G eng %P 689-691 %R 10.1063/1.121949 %T Positive giant magnetoresistance in a Fe3O4/SrTiO3/La0.7Sr 0.3MnO3 heterostructure %V 73