Numerical investigation of floating zone silicon using Halbach array magnets

•The application of Halbach array magnets for FZ process is proposed.•Magnetic field in the melt provided by Halbach array magnets is adequately strong.•Halbach array magnets can locally restrain the melt flow.•Halbach array magnets can improve the crystallization interface deflection. Novel applica...

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Bibliographic Details
Published in:Journal of Crystal Growth Vol. 546; p. 125773
Main Authors: Han, Xue-Feng, Kakimoto, Koichi, Alradi, Samah, Zaidat, Kader
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 15.09.2020
Elsevier BV
Elsevier
Subjects:
[INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation
[SPI.MAT]Engineering Sciences [physics]/Materials
A1. Computer simulation
A1. Fluid flows
A1. Magnetic fields
A2. Floating zone technique
Arrays
B2. Semiconducting silicon
Computer Science
Crystallization
Electromagnetic fields
Electromagnetism
Engineering Sciences
Flow velocity
Magnetic fields
Magnets
Materials
Modeling and Simulation
Silicon
Temperature distribution
Three dimensional flow
A1. Magnetic fields
A1. Computer simulation
A1. Fluid flows
A2. Floating zone technique
B2. Semiconducting silicon
ISSN:0022-0248, 1873-5002
Online Access:Get full text
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Summary:•The application of Halbach array magnets for FZ process is proposed.•Magnetic field in the melt provided by Halbach array magnets is adequately strong.•Halbach array magnets can locally restrain the melt flow.•Halbach array magnets can improve the crystallization interface deflection. Novel applications of Halbach array magnets in floating zone processes are proposed. Calculations of the floating zone process with two designs of Halbach array magnets are carried out and compared with the conventional floating zone process. The first part of the calculations including the static and high-frequency electromagnetic fields in the melt and crystal are modelled in COMSOL software. The effect of electromagnetic fields on the melt flow is calculated in three dimensions. From the calculation results, we confirm that Halbach array magnets can provide an adequately strong magnetic field at the surface of silicon to affect the melt flow. From the comparison of calculation results between conventional floating zone and floating zone with Halbach array magnets, the effects of the magnetic field on the melt flow, the temperature distribution, and the crystallization interface are confirmed. Halbach array magnets can locally restrain the melt flow velocity and improve the deflection of the crystallization interface.
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ISSN:0022-0248
1873-5002
DOI:10.1016/j.jcrysgro.2020.125773