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Physics > Atomic and Molecular Clusters

arXiv:physics/0503009 (physics)
[Submitted on 1 Mar 2005]

Title:Large Magnetic Moments of Arsenic-Doped Mn Clusters and their Relevance to Mn-Doped III-V Semiconductor Ferromagnetism

Authors:Mukul Kabir, D. G. Kanhere, Abhijit Mookerjee
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Abstract: We report electronic and magnetic structure of arsenic-doped manganese clusters from density-functional theory using generalized gradient approximation for the exchange-correlation energy. We find that arsenic stabilizes manganese clusters, though the ferromagnetic coupling between Mn atoms are found only in Mn$_2$As and Mn$_4$As clusters with magnetic moments 9 $\mu_B$ and 17 $\mu_B$, respectively. For all other sizes, $x=$ 3, 5-10, Mn$_x$As clusters show ferrimagnetic coupling. It is suggested that, if grown during the low temperature MBE, the giant magnetic moments due to ferromagnetic coupling in Mn$_2$As and Mn$_4$As clusters could play a role on the ferromagnetism and on the variation observed in the Curie temperature of Mn-doped III-V semiconductors.
Comments: 4 Pages, 3 Figures[1 EPS and 2 JPG files], RevTeX4
Subjects: Atomic and Molecular Clusters (physics.atm-clus)
Cite as: arXiv:physics/0503009 [physics.atm-clus]
  (or arXiv:physics/0503009v1 [physics.atm-clus] for this version)
  https://doi.org/10.48550/arXiv.physics/0503009
Journal reference: Physical Review B 73, 075210 (2006)
Related DOI: https://doi.org/10.1103/PhysRevB.73.075210

Submission history

From: Mukul Kabir [view email]
[v1] Tue, 1 Mar 2005 12:45:17 UTC (121 KB)
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