| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Robust Half-Metallicity in a Chromium-Substituted AlN |
| S. Arif1, Iftikhar Ahmad2*, B. Amin1, H. A. Rahnamaye Aliabad3
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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
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| Cite this article: |
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S. Arif, Iftikhar Ahmad, B. Amin et al 2011 Chin. Phys. Lett. 28 108501 |
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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.
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| Keywords:
85.75.-d
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Received: 06 July 2011
Published: 28 September 2011
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| PACS: |
85.75.-d
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(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)
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