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 |
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文章編號 | 023917 |
期刊 | Journal of Applied Physics |
卷 | 103 |
發行號 | 2 |
DOIs | |
出版狀態 | 已發佈 - 2008 |
對外發佈 | 是 |
ASJC Scopus subject areas
- 一般物理與天文學