Magnetoresistance of La0.7Ca0.3MnO3 thin film biepitaxial step junctions

S. F. Chen, W. J. Chang, S. J. Liu, J. Y. Juang, J. Y. Lin, K. H. Wu, T. M. Uen, Y. S. Gou

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3 Citations (Scopus)

Abstract

The biepitaxial La0.7Ca0.3MnO3 (LCMO) thin films grown on SrTiO3 substrates using a buffer layer of anatase TiO2 were fabricated. The magnetoresistance (MR) of biepitaxial step junction (BSJ) across the boundary layer of biepitaxial LCMO (0 0 1) and LCMO (1 1 0) film was investigated. The temperature and field dependence of MR for BSJ are qualitatively similar to those obtained in other type of artificial grain boundaries with a comparable MR ratio at low temperatures. However, the observed linear current-voltage characteristic across BSJ is in sharp contrary to the commonly reported non-ohmic characteristics. The results are consistent with features predicted by the model of spin-dependent transport across a depressed magnetic ordering and metallic-like junction layer.

Original languageEnglish
Pages (from-to)267-274
Number of pages8
JournalPhysica B: Condensed Matter
Volume336
Issue number3-4
DOIs
Publication statusPublished - 2003 Aug 1

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Keywords

  • Biepitaxial step junction
  • Grain boundary
  • LCMO
  • Magnetoresistance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Chen, S. F., Chang, W. J., Liu, S. J., Juang, J. Y., Lin, J. Y., Wu, K. H., Uen, T. M., & Gou, Y. S. (2003). Magnetoresistance of La0.7Ca0.3MnO3 thin film biepitaxial step junctions. Physica B: Condensed Matter, 336(3-4), 267-274. https://doi.org/10.1016/S0921-4526(03)00261-8