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Observation of hysteretic magnetoresistance in Mn-doped GaN nanowires with the mesoscopic Co and contacts
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10.1063/1.2009832
/content/aip/journal/apl/87/6/10.1063/1.2009832
http://aip.metastore.ingenta.com/content/aip/journal/apl/87/6/10.1063/1.2009832
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Figures

Image of FIG. 1.
FIG. 1.

(a) HRTEM image shows single crystalline nature of nanowire with a thin oxide outer layer. (b) Magnetization loops of the nanowires measured at and . The hysteresis behavior and remanence were observed at both temperatures.

Image of FIG. 2.
FIG. 2.

The SEM image of a Mn-doped GaN NW with two (bright electrodes) and two ferromagnetic Co electrodes (dark electrodes). The numbers in the image represent the Co and electrodes for electrical measurements.

Image of FIG. 3.
FIG. 3.

The MR curve as a function of magnetic field between electrodes 2 and 9 at temperatures of , , and , with a bias voltage of . Inset shows MR ratios as a function of temperature for three different sets of electrodes.

Image of FIG. 4.
FIG. 4.

The MR curve between the non-magnetic electrodes, 1 and 9 at . Inset shows and curves between electrodes, 2 and 9.

Image of FIG. 5.
FIG. 5.

The MR curves for electrodes, 2–9 at with varied bias voltage. Inset: the bias dependences of the MR ratio for three couples of electrodes at .

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/content/aip/journal/apl/87/6/10.1063/1.2009832
2005-08-02
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Observation of hysteretic magnetoresistance in Mn-doped GaN nanowires with the mesoscopic Co and Ti∕Au contacts
http://aip.metastore.ingenta.com/content/aip/journal/apl/87/6/10.1063/1.2009832
10.1063/1.2009832
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