Structure and magnetotransport properties of epitaxial nanocomposite La 0.67Ca 0.33MnO 3:SrTiO 3 thin films grown by a chemical solution approach

Ling Fei, Leyi Zhu, Xuemei Cheng, Haiyan Wang, Stacy M. Baber, Joshua Hill, Qianglu Lin, Yun Xu, Shuguang Deng, Hongmei Luo

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Abstract

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 [202] film[202] 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.

Original languageEnglish (US)
Article number082403
JournalApplied Physics Letters
Volume100
Issue number8
DOIs
StatePublished - Feb 20 2012

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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