Nonlinear current-voltage characteristics of oxygen-deficient La 0.67Ca0.33MnO3-y films

S. J. Liu, J. Y. Juang, J. Y. Lin, K. H. Wu, T. M. Uen, Y. S. Gou

研究成果: 雜誌貢獻期刊論文同行評審

3 引文 斯高帕斯(Scopus)

摘要

Two different types of nonlinear current-voltage characteristics are observed in oxygen-deficient La0.67 Ca0.33 MnO3-y (LCMO) films at temperatures below the insulator-metal transition. The paraboliclike dynamic conductance G (V), defined as dI / dV, curves near the zero bias observed in highly oxygen-deficient LCMO films implies the contribution from the spin-dependent tunneling transport between ferromagnetic clusters, with magnetic-disordered regions serving as tunneling barriers. On the other hand, for the slightly oxygen-deficient LCMO films, dips around the zero bias were observed in nonlinear G (V) curves and have been attributed to spin-flip scattering, with oxygen vacancies serving as scattering centers.

原文英語
文章編號023917
期刊Journal of Applied Physics
103
發行號2
DOIs
出版狀態已發佈 - 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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