Publication
Title
Mechanisms of double magnetic exchange in dilute magnetic semiconductors
Author
Abstract
A microscopic Hamiltonian for interacting manganese impurities in dilute magnetic semiconductors (DMS) is derived. It is shown that in p-type III-V DMS, the indirect exchange between Mn impurities has similarities with the Zener mechanism in transition metal oxides. Here the mobile and localized holes near the top of the valence band play the role of unoccupied p-orbitals which induce ferromagnetism. T-C estimated from the proposed kinematic exchange agrees with experiments on (Ga,Mn)As. The model is also applicable to the p-doped (Ga,Mn)P system. The magnetic ordering in n-type (Ga,Mn)N is due to exchange between the electrons localized on the levels lying deep in the forbidden energy gap. This mechanism is even closer to the original Zener mechanism. (C) 2003 Elsevier B.V. All rights reserved.
Language
English
Source (journal)
Journal of magnetism and magnetic materials. - Amsterdam
Source (book)
International Conference on Magnetism (ICM 2003), JUL 27-AUG 01, 2003, Rome, ITALY
Publication
Amsterdam : 2004
ISSN
0304-8853
Volume/pages
272:Part 3(2004), p. 1967-1968
ISI
000222236800142
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 03.01.2013
Last edited 31.07.2017
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