Title :
A Mossbauer effect study of the dilute magnetic semiconductor Cd 1-xFexTe
Author :
Pankhurst, Q.A. ; Johnson, C.E. ; Sankaranarayanan, V.K. ; Thomas, M.F. ; Giriat, W.
Author_Institution :
Dept. of Phys., Liverpool Univ., UK
fDate :
3/1/1994 12:00:00 AM
Abstract :
The state of the Fe ions in the dilute magnetic semiconductors Cd 0.97Fe0.03Te and Cd0.95Fe0.05Te has been determined using Mossbauer spectroscopy. The spectra show an evolution from a single line at 300 K to a sextet of broadened lines at 4.2 K. Analysis indicates that the iron is present as Fe2+ ions and that the six line spectrum at 4.2 K is not magnetic but is composed of three separate quadrupole doublets. These occur as the cubic symmetry of the Fe2+ site is removed by distortions caused by Fe substitution on neighbouring Cd sites
Keywords :
Mossbauer effect; cadmium compounds; iron compounds; semimagnetic semiconductors; spectral line breadth; (CdFe)Te; 300 K; 4.2 K; Cd1-xFexTe; Fe2+ ions; Mossbauer effect; cubic symmetry; dilute magnetic semiconductor; quadrupole doublets; Iron; Magnetic materials; Magnetic moments; Magnetic semiconductors; Magnetic separation; Magnetostriction; Semiconductor device doping; Spectroscopy; Stationary state; Tellurium;
Journal_Title :
Magnetics, IEEE Transactions on
