One possible mechanism of spiral/footing growth of Cz-grown Li6Gd(BO3)3
Résumé
Experimental observations on spiralgrowth phenomena in the Cz-growth of Li6Gd(BO3)3 single crystals are described. With careful observations at the meniscus part during the pulling, we found that the faceting formation is closely correlated with a "dog-leg" footing in combination with unsteady melt convection modes. It is assumed that one of predominant origin of the so-called spiralgrowth should be the faceting inclined against the pulling axis at the meniscus part of the solid-liquid interface. Several origins reported so far are also discussed.