%0 Journal Article
%A C Kwon
%A K.-C Kim
%A M.C Robson
%A J.Y Gu
%A M Rajeswari
%A T Venkatesan
%A Ramamoorthy Ramesh
%B Journal of Applied Physics
%D 1997
%G eng
%I American Institute of Physics Inc.
%P 4950-4952
%T Desirable magnetotransport properties in doped Mn-oxide-based superlattices
%V 81
%X Superlattice structures based on doped Mn-oxides and SrTiO3 exhibit desirable magnetotransport properties, such as an enhanced magnetoresistance (MR) and a broadened MR transition. An La0.7Ca0.3MnO3 (55 Å)/SrTiO3 (160 Å) superlattice shows 61% MR at 0.5 T and 109 K, defined by [R(0 T)-A(0.5 T)]/R(0 T), compared to 38% MR for a single layer La0.7Ca0.3MnO3 film at 125 K. MR of larger than 85% at 5 T has been observed in a broad temperature range (from 150 to 10 K) for this superlattice. A systematic study of La0.7Ba0.3MnO3/SrTiO3 superlattices shows that the decrease of the La0.7Ba0.3MnO3 layer thickness results in the broadening of the MR peak in temperature. © 1997 American Institute of Physics.