%0 Journal Article %A S Jin %A M McCormack %A T.H Tiefel %A Ramamoorthy Ramesh %B Journal of Applied Physics %D 1994 %G eng %P 6929-6933 %R 10.1063/1.358119 %T Colossal magnetoresistance in La-Ca-Mn-O ferromagnetic thin films (invited) %V 76 %X {A colossal magnetoresistance effect with more than a thousandfold change in resistivity (ΔR/RH=127 000% at 77 K