Investigation of asymmetry effects in a heater-magnet module for TMF VGF and LEC growth by three-dimensional numerical modeling

verfasst von: H. Kasjanow, B. Nacke, St Eichler, D. Jockel, Ch Frank-Rotsch, P. Lange, F. M. Kießling, P. Rudolph
Abstract: Three-dimensional (3D) electromagnetic computer modeling is used to analyze the effects of asymmetry at the crystal growth by the vertical gradient freeze (VGF) and liquid encapsulation Czochralski (LEC) methods under traveling magnetic fields (TMF). Based on the results a heater-magnet module (HMM), combining the generation of heat and induction of magnetic field, was developed and optimized. It will be shown that asymmetry effects are caused by the designs of the heater-magnet coils and bus bars. They are enforced when a TMF of higher frequencies is used. It can be concluded that for VGF arrangements without container rotation the module design must be modified. Compared to that in case of LEC the effect of asymmetry can be effectively graduated by crucible and crystal rotations.
Organisationseinheit(en): Institut für Elektroprozesstechnik
Externe Organisation(en): Leibniz-Institut für Kristallzüchtung (IKZ)
Freiberger Compound Materials GmbH
Typ: Artikel
Journal: Journal of Crystal Growth
Band: 310
Seiten: 1540-1545
Anzahl der Seiten: 5
ISSN: 0022-0248
Publikationsdatum: 04.2008
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Physik der kondensierten Materie, Anorganische Chemie, Werkstoffchemie
Elektronische Version(en): https://doi.org/10.1016/j.jcrysgro.2007.10.077 (Zugang: Geschlossen)

BibTeX

@article{07e97e5976c14b13ad07b3cbf8a281bb,
title = "Investigation of asymmetry effects in a heater-magnet module for TMF VGF and LEC growth by three-dimensional numerical modeling",
abstract = "Three-dimensional (3D) electromagnetic computer modeling is used to analyze the effects of asymmetry at the crystal growth by the vertical gradient freeze (VGF) and liquid encapsulation Czochralski (LEC) methods under traveling magnetic fields (TMF). Based on the results a heater-magnet module (HMM), combining the generation of heat and induction of magnetic field, was developed and optimized. It will be shown that asymmetry effects are caused by the designs of the heater-magnet coils and bus bars. They are enforced when a TMF of higher frequencies is used. It can be concluded that for VGF arrangements without container rotation the module design must be modified. Compared to that in case of LEC the effect of asymmetry can be effectively graduated by crucible and crystal rotations.",
keywords = "A1. Computer simulation, A2. Magnetic field-assisted methods",
author = "H. Kasjanow and B. Nacke and St Eichler and D. Jockel and Ch Frank-Rotsch and P. Lange and Kie{\ss}ling, {F. M.} and P. Rudolph",
year = "2008",
month = apr,
doi = "10.1016/j.jcrysgro.2007.10.077",
language = "English",
volume = "310",
pages = "1540--1545",
journal = "Journal of Crystal Growth",
issn = "0022-0248",
publisher = "Elsevier",
number = "7-9",
}