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Electric-field control of ferromagnetism in (Ga,Mn)As
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) External magnetic field dependence of Hall resistance at temperatures from .

Image of FIG. 2.
FIG. 2.

(Color online) External magnetic field dependence of Hall resistance under external electric fields of , 0, and (a) at and (b) . (c) Temperature dependence of proportional to the spontaneous magnetization determined by the Arrott plots ( vs plot). The inset shows the hole concentration dependence of Curie temperature with theoretical calculation by the Zener model (solid line).

Image of FIG. 3.
FIG. 3.

(Color online) Angle dependence of Hall resistance at (a) 30, (b) 50, and (c) . The applied and are and , respectively. is the angle of from the [001] direction in the plane perpendicular to the current. Solid lines are fitted curves by the Stoner-Wohlfarth model. Sweep up (down) is shown by the open circles (triangles). (d) dependence of and . (e) dependence of coercivity modulation under the applications of (triangles) and (inverse triangles). (f) Magneto-optical Kerr effect images at from . The images were taken after application of (close to ) indicated in each image. The dark region indicates the region where is reversed.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electric-field control of ferromagnetism in (Ga,Mn)As