Study of Ferromagnetism in Diluted Magnetic Semiconductor CAAS
No Thumbnail Available
Date
2007-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
In the present study we study ferromagnetism of a transition free diluted magnetic
semiconductor CaAs. Ferromagnetism in this curious material is due to the spin
polarization of p-orbitals of the As atom. This mechanism is different from that
of the CrAs in which Cr atoms possess magnetic moments [20, 23]. Ca atom does
not have magnetic moments; its role is just to provide electrons with As atoms at
the fcc site and to sustain crystal symmetry. The Curie temperature is estimated
within an improvement over the mean-field approximation RKKY interaction for homogeneous
systems with randomly distributed localized spins and is obtained to be
approximately proportional to the spin concentration
Description
Keywords
Magnetic Semiconductor CAAS