ISSN:
1090-6487
Keywords:
75.50.Pp
;
78.20.Fm
;
78.20.Ls
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Spectral measurements of the Voigt birefringence Δn were performed for the cubic magnetic semiconductor Cd1−x Mn x Te (0≤x≤0.52) in order to investigate how the exchange interaction of Mn2+ ions with itinerant electrons depends on the electron wave vector. It was determined that Δn/x 2 is independent of x and the magnetic field direction, i.e., the effect is due to the Mn2+ ions and is isotropic. Below the band gap edge the dispersion of the birefringence Δn can be described well in all samples by the unusual dependence Δn∼(E g −ℏω) −3.5. This can be explained by a decrease of the exchange interaction of Mn2+ ions with itinerant electrons with increasing distance from the center of the Brillouin zone.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1134/1.567733
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