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

doi:10.1063/1.2833433

Nonlinear current-voltage characteristics of oxygen-deficient La _0.67Ca_0.33MnO_3-y films

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

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.

Original language	English
Article number	023917
Journal	Journal of Applied Physics
Volume	103
Issue number	2
DOIs	https://doi.org/10.1063/1.2833433
Publication status	Published - 2008
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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

abstract = "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.",

author = "Liu, {S. J.} and Juang, {J. Y.} and Lin, {J. Y.} and Wu, {K. H.} and Uen, {T. M.} and Gou, {Y. S.}",

note = "Funding Information: This work was supported by the National Science Council of Taiwan, under Grant No. NSC 95-2112-M-131-002-MY3.",

year = "2008",

doi = "10.1063/1.2833433",

language = "English",

volume = "103",

journal = "Journal of Applied Physics",

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TY - JOUR

T1 - Nonlinear current-voltage characteristics of oxygen-deficient La 0.67Ca0.33MnO3-y films

AU - Liu, S. J.

AU - Juang, J. Y.

AU - Lin, J. Y.

AU - Wu, K. H.

AU - Uen, T. M.

AU - Gou, Y. S.

N1 - Funding Information: This work was supported by the National Science Council of Taiwan, under Grant No. NSC 95-2112-M-131-002-MY3.

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

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Nonlinear current-voltage characteristics of oxygen-deficient La _0.67Ca_0.33MnO_3-y films

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