Document Type
Article
Original Publication Date
2004
Journal/Book/Conference Title
Physical Review B
Volume
69
Issue
21
DOI of Original Publication
10.1103/PhysRevB.69.214422
Date of Submission
May 2015
Abstract
Electronic structure, energy bands, and magnetic properties of Cr-doped GaN have been calculated from first principles using a 32 atom supercell within the frame work of linearized muffin-tin orbital tight binding method and gradient-corrected density-functional theory. The coupling between Cr atoms is found to be ferromagnetic with a magnetic moment of 2.69μB at each Cr site. The magnetic moments of Ga and N sites are rather small, namely, 0.025μB and −0.025μB, respectively, yielding a total moment of 6μB per supercell. Parallel calculations done on small clusters of Cr-doped GaN also yield similar results indicating that magnetic coupling between Cr atoms results from a local phenomenon. These results are consistent with the recent experimental discovery of ferromagnetism in Cr-doped GaN single crystals.
Rights
Das, G.P., Rao, B.K., Jena, P. Ferromagnetism in Cr-doped GaN: A first-principles calculation. Physical Review B, 69, 214422 (2004). Copyright © 2004 American Physical Society.
Is Part Of
VCU Physics Publications
Comments
Originally published by the American Physical Society at: http://dx.doi.org/10.1103/PhysRevB.69.214422