Physics – Condensed Matter – Materials Science
Scientific paper
2008-01-06
Physical Review B 78, 085314 (2008)
Physics
Condensed Matter
Materials Science
Submitted to Physical Review Letters. Updates version 1 to include a more detailed discussion of the effect of strain on the a
Scientific paper
10.1103/PhysRevB.78.085314
We demonstrate dynamic voltage control of the magnetic anisotropy of a (Ga,Mn)As device bonded to a piezoelectric transducer. The application of a uniaxial strain leads to a large reorientation of the magnetic easy axis which is detected by measuring longitudinal and transverse anisotropic magnetoresistance coefficients. Calculations based on the mean-field kinetic-exchange model of (Ga,Mn)As provide microscopic understanding of the measured effect. Electrically induced magnetization switching and detection of unconventional crystalline components of the anisotropic magnetoresistance are presented, illustrating the generic utility of the piezo voltage control to provide new device functionalities and in the research of micromagnetic and magnetotransport phenomena in diluted magnetic semiconductors.
Ahmad E.
Campion R. P.
Edmonds K. W.
Foxon C. T.
Gallagher B. L.
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