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Long‐term Crystal Growth under Microgravity during the EURECA‐1 Mission (II) THM Growth of Sulphur‐doped InP
Author(s) -
Danilewsky A. N.,
Meinhardt J.,
Benz K. W.
Publication year - 1996
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170310202
Subject(s) - indium , buoyancy , doping , crystal (programming language) , crystal growth , diffusion , photoluminescence , convection , materials science , analytical chemistry (journal) , mineralogy , chemistry , crystallography , optics , physics , metallurgy , mechanics , thermodynamics , optoelectronics , environmental chemistry , computer science , programming language
Long‐term crystal growth experiments were successfully performed under microgravity conditions during the first flight of the unmanned EURECA‐1 mission in the automatic mirror furnace (AMF). Two crystals of sulphur‐doped InP with [001] and [111] orientation respectively were grown from indium solution by the travelling heater method (THM). The absence of time dependent buoyancy‐driven convection is documented by the lack of type I striations in the space‐grown crystals. The sulphur concentration is measured by spatially resolved photoluminescence. As expected, the macrosegregation can be described by a pure diffusion‐controlled model which is in good agreement with the findings from the first German spacelab mission D1. Compared to the earth‐grown reference samples, both of the space‐grown InP crystals show strong disturbances such as inclusions and type II striations. The morphological instabilities are similar to growth disturbances already known from the space‐grown MD‐ELI‐01 from the D1 mission.