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Tm Doping of Lead Telluride

Published online by Cambridge University Press:  21 February 2011

Ludmila I. Ryabova  and
Marina E. Tamm
Ludmila I. Ryabova
Affiliation:
Moscow State University, 119899, Moscow, Russia
Marina E. Tamm
Affiliation:
Moscow State University, 119899, Moscow, Russia
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Abstract

Doping with the rare earth elements is widely used for the improvement of parameters of the PbTe-based lasers. It has been found that Tm is a donor in PbTe, and the solubility of TmTe in PbTe does not exceed 7 - 8 mol.%. Electron concentration in obtained PbTe(Tm) crystals reaches 4.1020 cm-3 and depends on Tm content and on deviation from stoichiometry. The analysis of the magnetoresistance oscillation picture shows no variation of the energy spectrum parameters for Tm contents less than I at.%. The g-factor does not change as well. This may be due to a rather small exchange interaction between Tm atom, which is magnetic in both +2 and +3 valence states, and band electrons. The experimental data for PbTe(Tm) are compared with the properties of semimagnetic PbTe(Cr) with quite the same electron consentration value.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 301: Symposium E – Rare-Earth Doped Semiconductors , 1993 , 225
Copyright
Copyright © Materials Research Society 1993

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References

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