Ferromagnetism in diluted Pb{sub 1-x-y}Ge{sub x}Cr{sub y}Te magnetic semiconductors
- Moscow State University, Faculty of Physics (Russian Federation)
- Moscow State University, Faculty of Materials Science (Russian Federation)
- National Academy of Sciences of Ukraine, Institute of Materials Science Problems (Ukraine)
Magnetic properties of Pb{sub 1-x-y}Ge{sub x}Cr{sub y} Te alloys (x = 0.02-0.20, y = 0.01-0.08) were studied. It was detected that the magnetic susceptibility of alloys consists of two contributions: the paramagnetic Curie-Weiss part (the temperature region is T < 50 K) caused, probably, by the Cr{sup 3+} ion paramagnetism, and the high-temperature ferromagnetic part (T < 300 K). The dependences of the concentration of magnetic centers on the composition of the matrix were obtained from the paramagnetic and ferromagnetic contributions. It was shown that a decrease in the concentration of paramagnetic centers can be, at least qualitatively, explained by the transformation of the electronic structure as the germanium concentration increases. A phenomenological model was suggested, which explains the behavior of magnetic properties as the chromium content increases, and possible mechanisms of ferromagnetic ordering in studied alloys are discussed.
- OSTI ID:
- 21260408
- Journal Information:
- Semiconductors, Journal Name: Semiconductors Journal Issue: 3 Vol. 43; ISSN SMICES; ISSN 1063-7826
- Country of Publication:
- United States
- Language:
- English
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