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ZnGep2 : Optical Transparency and Melt Composition

Published online by Cambridge University Press:  10 February 2011

G.A. Verozubova ,
A.I. Gribenyukov ,
A.W. Vere ,
C. Flynn  and
Y.F. Ivanov
G.A. Verozubova
Affiliation:
Institute for Optical Monitoring pr.AKademicheskii 10/3 Tomsk 634021 Russia e-mail:galina @losiom.tomsk.ru
A.I. Gribenyukov
Affiliation:
Institute for Optical Monitoring pr.AKademicheskii 10/3 Tomsk 634021 Russia e-mail:galina @losiom.tomsk.ru
A.W. Vere
Affiliation:
Defence Research Evaluation Agency (DERA) St Andrews Road, Malvem, WR 14 3PS, UK, e-mail: [email protected]
C. Flynn
Affiliation:
Defence Research Evaluation Agency (DERA) St Andrews Road, Malvem, WR 14 3PS, UK
Y.F. Ivanov
Affiliation:
Tomsk Polytechnical University Tomsk 634036 Russia
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Abstract

The paper presents the results of TEM and optical transparency measurements on ZnGeP2 crystals grown by the vertical Bridgman technique from melts of differing compositions. The TEM study reveals the presence of nano-dimensional precipitates of second phases: zinc and ZnxPy precipitation occurs in material grown from Zn-rich melts and GeP from the deficient melts. The precipitation is associated with cooling through the retrograde solidus at a temperature below the melting point. Elastic stress fields are also observed. The relationships between the precipitates and elastic stresses and between precipitation and optical losses are investigated

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 607: Symposium OO – Infrared Applications of Semiconductors III , 1999 , 457
Copyright
Copyright © Materials Research Society 2000

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References

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