Robust Half-Metallicity in a Chromium-Substituted AlN
S. Arif1, Iftikhar Ahmad2*, B. Amin1, H. A. Rahnamaye Aliabad3
1Materials Modeling Laboratory, Department of Physics, Hazara University, Mansehra, Pakistan 2Department of Physics, University of Malakand, Chakdara, Pakistan 3Department of Physics, Sabzevar Tarbiat Moallem University, Sabzevar, Iran
Robust Half-Metallicity in a Chromium-Substituted AlN
S. Arif1, Iftikhar Ahmad2*, B. Amin1, H. A. Rahnamaye Aliabad3
1Materials Modeling Laboratory, Department of Physics, Hazara University, Mansehra, Pakistan 2Department of Physics, University of Malakand, Chakdara, Pakistan 3Department of Physics, Sabzevar Tarbiat Moallem University, Sabzevar, Iran
摘要We investigate half metallicity in a chromium (Cr)-substituted AlN dilute magnetic semiconductor using the full-potential linearized augmented plane-wave method. Our results show that Al0.75Cr0.25N is half metal and holds a net integer magnetic moment of 3μβ with lattice compression. The half−metallic nature is maintained from the relaxed lattice constant 4.36 Å to 4.09 Å. An abrupt change of the physical properties is observed at a robust transition lattice constant of 4.09 Å, and the material transforms from half metal to metal. We find that up to 6% compression, the material maintains its half-metallic nature. Furthermore, we also confirm that the origin of ferromagnetism in Al0.75Cr0.25N is double exchange.
Abstract：We investigate half metallicity in a chromium (Cr)-substituted AlN dilute magnetic semiconductor using the full-potential linearized augmented plane-wave method. Our results show that Al0.75Cr0.25N is half metal and holds a net integer magnetic moment of 3μβ with lattice compression. The half−metallic nature is maintained from the relaxed lattice constant 4.36 Å to 4.09 Å. An abrupt change of the physical properties is observed at a robust transition lattice constant of 4.09 Å, and the material transforms from half metal to metal. We find that up to 6% compression, the material maintains its half-metallic nature. Furthermore, we also confirm that the origin of ferromagnetism in Al0.75Cr0.25N is double exchange.
(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)
引用本文:
S. Arif;Iftikhar Ahmad*;B. Amin;H. A. Rahnamaye Aliabad
. Robust Half-Metallicity in a Chromium-Substituted AlN[J]. 中国物理快报, 2011, 28(10): 108501-108501.
S. Arif, Iftikhar Ahmad*, B. Amin, H. A. Rahnamaye Aliabad
. Robust Half-Metallicity in a Chromium-Substituted AlN. Chin. Phys. Lett., 2011, 28(10): 108501-108501.
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