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In-situ visualization of the quasi-periodic crystal growth interface fluctuation by growth interface electromotive force spectrum in Czochralski system

Abstract

Inhomogeneity and striations, stemming from growth interface fluctuation, impair the performance of bulk single crystals. Although enormous number of theoretical and experimental simulations have generalized interface fluctuation, the in-situ detection in high-temperature and constantly-moving Czochralski (CZ) system is still unattainable. To solve this issue, we use growth interface electromotive force (GEMF) to reveal interface fluctuation and visualize both the corresponding subtle growth rate and temperature fluctuations in real CZ sysem. In addition, GEMF could present the regularity of coupled melt convection as well as predict a gradient surface morphology. Notably, the visualization of above phenomena is far beyond the capability of current crystal growth sensors. But based on GEMF method, significant evidence to reveal convection instability is achieved. More importantly, the high-precision and in-situ GEMF feedback could bridge the quasi-periodic interface fluctuation with convection control approaches and become a visual guidance to optimize the growth system, which serves to achieve the striation-free high quality crystal boule.

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Publication details

The article was accepted on 04 Dec 2018 and first published on 06 Dec 2018


Article type: Paper
DOI: 10.1039/C8CE01949E
Citation: CrystEngComm, 2018, Accepted Manuscript
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    In-situ visualization of the quasi-periodic crystal growth interface fluctuation by growth interface electromotive force spectrum in Czochralski system

    Y. Zhu, S. Lin, Z. Liu, W. Wang, D. C. Ma and B. Wang, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE01949E

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