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Breakdown by magnetic field in a La0.7Sr0.3MnO3/MgO/Fe spin valve
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View: Figures


Image of FIG. 1.
FIG. 1.

The XRD pattern of the LSMO/MgO/Fe multilayer structure. The y-axis is shown logarithmically. The inset is Fe 2P3/2 XPS of the multilayer samples with (upper curve) and without (lower curve) Mg-MgO layer.

Image of FIG. 2.
FIG. 2.

(a) Schematic representation of a typical device consisted of LSMO bottom electrodes and Fe top electrodes and a MgO barrier. (b)-(d) MR curves of the spin valve device. The magnetic field ranges are (b) ±3.5 kOe, (c) ±5.5 kOe, and (d) ±12 kOe, respectively. All the MR curves were measured at 190 K.

Image of FIG. 3.
FIG. 3.

The sketch for parallel connection superposition of an inverse TMR curve and a common resistance with breakdown at high magnetic field. C1 and C2 are forward part (from −12 to 12 kOe) and backward part (from 12 to −12 kOe) of an inverse TMR curve. C3 depicts a resistance with taking a breakdown effect at high magnetic field into account. C4 is the parallel superposition of C1 and C3.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Breakdown by magnetic field in a La0.7Sr0.3MnO3/MgO/Fe spin valve