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Effects of clustering and dimensionality on the magnetic properties of diluted magnetic semiconductors

Published online by Cambridge University Press:  01 February 2011

R. N. Bhatt
Affiliation:
Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, USA.
Malcolm. P. Kennett
Affiliation:
Cavendish Laboratories, University of Cambridge, Madingley Rd, Cambridge CB3 OHE, UK.
Adel Kassaian
Affiliation:
Department of Physics and Astronomy, University of British Columbia, Van couver, BC V6T 1Z1, Canada.
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Abstract

The magnetic properties of films of diluted magnetic semiconductors (DMS) such as (Ga,Mn)As, as well as bulk grown crystals of similar materials, have been found to be extremely sensitive to growth conditions, both in terms of the ferromagnetic transition temperature, and the details of their magnetization curves. We study an impurity band model for carriers in Mn-doped DMS applicable in the low carrier density regime, and discuss the effects of clustering on the magnetic properties of DMS, using both numerical mean field and Monte Carlo simulations. In addition, we study the effects of dimensionality on the transition temperature and other magnetic behaviour, and compare our results with experimental data.

Type
Research Article
Copyright
Copyright © Materials Research Society 2004

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