Materials Research Science and Engineering Center
Date of this Version
6-17-2005
Abstract
We investigate the electronic structure and magnetic properties of GdN as a function of unit cell volume. Based on the first-principles calculations of GdN, we observe that there is a transformation in the conduction properties associated with the volume increase: first from half-metallic to semimetallic, then ultimately to semiconducting. We show that applying stress can alter the carrier concentration as well as mobility of the holes and electrons in the majority spin channel. In addition, we found that the exchange parameters depend strongly on lattice constant, thus the Curie temperature of this system can be enhanced by applying stress or doping impurities.
Comments
Published in Physical Review Letters 94, 237201 (2005).
URL: http://link.aps.org/abstract/PRL/v94/e237201
doi:10.1103/PhysRevLett.94.237201
Copyright 2005 American Physical Society. Used by permission.