Solute segregation during modified vertical gradient freezing of alloyed compound semiconductor crystals with magnetic and electric fields

X. Wang, N. Ma, D. F. Bliss, G. W. Iseler

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Single crystals of gallium-aluminum-antimonide are solidified from a solution of molten gallium-antimonide and aluminum-antimonide. Electromagnetic stirring can be induced in the melt by applying a weak electric field together with a weak axial magnetic field. This paper presents a numerical model which uses a Chebyshev spectral collocation method with a second-order implicit time integration scheme with Gauss-Lobatto collocation points. This investigation models the unsteady motion and solute transport during vertical gradient freezing by submerged heater growth with electromagnetic stirring. The radial homogeneity in the crystal improves as the solute's concentration increases.

Original languageEnglish
Pages (from-to)3429-3438
Number of pages10
JournalInternational Journal of Heat and Mass Transfer
Volume49
Issue number19-20
DOIs
StatePublished - Sep 2006
Externally publishedYes

Funding

This research was supported by the US Air Force Office of Scientific Research under grant FA9550-04-1-0249. The calculations were performed on the Cray X1 provided by the DoD High Performance Computing Modernization Program under grant AFSNH2487 and on the IBM pSeries 690 provided by the National Computational Science Alliance under grant DMR030015.

Fingerprint

Dive into the research topics of 'Solute segregation during modified vertical gradient freezing of alloyed compound semiconductor crystals with magnetic and electric fields'. Together they form a unique fingerprint.

Cite this