Epitaxial La 0.67Ca 0.33MnO 3:SrTiO 3 (LCMO:STO) composite thin films have been grown on single crystal LaAlO 3(001) substrates by a cost effective polymer-assisted deposition method. Both x-ray diffraction and high-resolution transmission electron microscopy confirm the growth of epitaxial films with an epitaxial relationship between the films and the substrates as (002) film(002) sub and  film sub. The transport property measurement shows that the STO phase significantly increases the resistivity and enhances the magnetoresistance (MR) effect of LCMO and moves the metal-insulator transition to lower temperatures. For example, the MR values measured at magnetic fields of 0 and 3 T are -44.6 at 255 K for LCMO, -94.2 at 125 K for LCMO:3 STO, and -99.4 at 100 K for LCMO:5 STO, respectively.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)