Journal of the Japanese Association for Crystal Growth
Online ISSN : 2187-8366
Print ISSN : 0385-6275
ISSN-L : 0385-6275
Direct observation of NdBa_2Cu_3O_x. crystallization
M. ShinmuraD.K. AswalT. KoyamaY. HayakawaM. Kumagawa
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1998 Volume 25 Issue 3 Pages A151-

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Abstract
The pseudo-binary phase diagram between NdBa_2Cu_3O_x and Ba_3Cu_<10>O_<13>, and the crystallization of NdBa_2Cu_4O_x in air have been observed in-situ using high temperature optical microscopy. For Ba_3Cu_<10>O_<13> composition range of 0-60mol%, the crystallization of NdBa_2Cu_3O_x via the peritectic reaction (Nd_4Ba_2Cu_2O_<10> +L→NdBa_2Cu_4O_x) has been directly ob. served. On the other hand, for higher flux composition the growth mechanism of NdBa_2Cu_4O_x changed from polyhedral via stacked to dendritic crystals with increasing cooling rate.
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© 1998 The Japanese Association for Crystal Growth
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