Voltage control of magnetocrystalline anisotropy in ferromagnetic - semiconductor/piezoelectric hybrid structures
| Autor: | E. Ahmad, A. W. Rushforth, C. S. King, Joerg Wunderlich, C. T. Foxon, Jan Zemen, R. P. Campion, B. L. Gallagher, E. De Ranieri, K. W. Edmonds, Tomas Jungwirth, Karel Výborný, Jan Kučera |
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| Rok vydání: | 2008 |
| Předmět: |
Condensed Matter - Materials Science
Materials science Condensed matter physics Magnetoresistance Condensed Matter - Mesoscale and Nanoscale Physics Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Magnetic semiconductor Condensed Matter Physics Magnetocrystalline anisotropy Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Electronic Optical and Magnetic Materials Magnetic anisotropy Magnetization Condensed Matter::Materials Science Exchange bias Magnetic shape-memory alloy Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Anisotropy |
| DOI: | 10.48550/arxiv.0801.0886 |
| Popis: | 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. Comment: Submitted to Physical Review Letters. Updates version 1 to include a more detailed discussion of the effect of strain on the anisotropic magnetoresistance |
| Databáze: | OpenAIRE |
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