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Title: Towards Optimization of ACRT Schedules Applied to the Gradient Freeze Growth of Cadmium Zinc Telluride

Historically, the melt growth of II-VI crystals has benefitted by the application of the accelerated crucible rotation technique (ACRT). Here, we employ a comprehensive numerical model to assess the impact of two ACRT schedules designed for a cadmium zinc telluride growth system per the classical recommendations of Capper and co-workers. The “flow maximizing” ACRT schedule, with higher rotation, effectively mixes the solutal field in the melt but does not reduce supercooling adjacent to the growth interface. The ACRT schedule derived for stable Ekman flow, with lower rotation, proves more effective in reducing supercooling and promoting stable growth. Furthermore, these counterintuitive results highlight the need for more comprehensive studies on the optimization of ACRT schedules for specific growth systems and for desired growth outcomes.
Authors:
ORCiD logo [1] ; ORCiD logo [1]
  1. Univ. of Minnesota, Minneapolis, MN (United States)
Publication Date:
Grant/Contract Number:
NA0002565
Type:
Accepted Manuscript
Journal Name:
Journal of Crystal Growth
Additional Journal Information:
Journal Volume: 480; Journal ID: ISSN 0022-0248
Publisher:
Elsevier
Research Org:
Univ. of Minnesota, Minneapolis, MN (United States); Washington State Univ., Pullman, WA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Computer simulation; Crystal morphology; Convection; Heat transfer; Mass transfer; Semiconducting II-VI materials
OSTI Identifier:
1397252

Divecha, Mia S., and Derby, Jeffrey J.. Towards Optimization of ACRT Schedules Applied to the Gradient Freeze Growth of Cadmium Zinc Telluride. United States: N. p., Web. doi:10.1016/j.jcrysgro.2017.10.001.
Divecha, Mia S., & Derby, Jeffrey J.. Towards Optimization of ACRT Schedules Applied to the Gradient Freeze Growth of Cadmium Zinc Telluride. United States. doi:10.1016/j.jcrysgro.2017.10.001.
Divecha, Mia S., and Derby, Jeffrey J.. 2017. "Towards Optimization of ACRT Schedules Applied to the Gradient Freeze Growth of Cadmium Zinc Telluride". United States. doi:10.1016/j.jcrysgro.2017.10.001. https://www.osti.gov/servlets/purl/1397252.
@article{osti_1397252,
title = {Towards Optimization of ACRT Schedules Applied to the Gradient Freeze Growth of Cadmium Zinc Telluride},
author = {Divecha, Mia S. and Derby, Jeffrey J.},
abstractNote = {Historically, the melt growth of II-VI crystals has benefitted by the application of the accelerated crucible rotation technique (ACRT). Here, we employ a comprehensive numerical model to assess the impact of two ACRT schedules designed for a cadmium zinc telluride growth system per the classical recommendations of Capper and co-workers. The “flow maximizing” ACRT schedule, with higher rotation, effectively mixes the solutal field in the melt but does not reduce supercooling adjacent to the growth interface. The ACRT schedule derived for stable Ekman flow, with lower rotation, proves more effective in reducing supercooling and promoting stable growth. Furthermore, these counterintuitive results highlight the need for more comprehensive studies on the optimization of ACRT schedules for specific growth systems and for desired growth outcomes.},
doi = {10.1016/j.jcrysgro.2017.10.001},
journal = {Journal of Crystal Growth},
number = ,
volume = 480,
place = {United States},
year = {2017},
month = {10}
}