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Crossover of magnetoresistance from negative to positive in the heterojunction composed of and Nb-doped
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10.1063/1.2212067
/content/aip/journal/apl/88/23/10.1063/1.2212067
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/23/10.1063/1.2212067
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

curves of LCMO/SNTO heterojunction at 60, 140, 220, and . The inset: schematic illustration of the electrodes setting.

Image of FIG. 2.
FIG. 2.

The magnetic tunable curves of the system with the negative and positive bias voltages under magnetic fields of 0, 5, and . (a) and (b), (c) and (d), (e) and (f), and (g) and (h) are taken at 60, 90, 180, and , respectively. The insets of (b), (d), (f), and (h) enlarge the curves of the system at the small bias current.

Image of FIG. 3.
FIG. 3.

The magnetic field dependence of MR at 60, 90, 180, and for two different bias currents (open symbols) and (closed symbols).

Image of FIG. 4.
FIG. 4.

The temperature dependence of MR at the bias current measured under different fields.

Image of FIG. 5.
FIG. 5.

Schematic diagram of spin dependent (large arrows) density of states. (a) depicts the case of strong Hund’s coupling and (b) depicts the case of weak Hund’s coupling.

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/content/aip/journal/apl/88/23/10.1063/1.2212067
2006-06-08
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Crossover of magnetoresistance from negative to positive in the heterojunction composed of La0.82Ca0.18MnO3 and 0.5wt% Nb-doped SrTiO3
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/23/10.1063/1.2212067
10.1063/1.2212067
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