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James, R. B.
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article
Kinetic parameters of Cd<sub>1‐x‐y</sub>Mn<sub>x</sub>Zn<sub>y</sub>Te alloys melting and crystallization processes
Abstract
<jats:title>Abstract</jats:title><jats:p>The knowledge about parameters of melting and crystallization processes is required for controlled growth of ternary or quaternary single crystals from the melts. The differential thermal analysis method was used for investigation of the melting and crystallization kinetic parameters of Cd<jats:sub>1‐x‐y</jats:sub>Mn<jats:sub>x</jats:sub>Zn<jats:sub>y</jats:sub>Te alloys (<jats:italic>x</jats:italic> = 0.05–0.25, <jats:italic>y</jats:italic> = 0.05, 0.10). Two different ways of sample thermal processing allow us to study the supercooling‐superheating dependencies and the volume fraction of quasi‐solid phase (clusters) depending on the melt holding temperature and time. “Negative” supercooling of Cd<jats:sub>1‐x‐y</jats:sub>Mn<jats:sub>x</jats:sub>Zn<jats:sub>y</jats:sub>Te melts was observed when superheating of the melts don't exceed 20 K after their melting start. The su‐ percooling values of Cd<jats:sub>1‐x‐y</jats:sub>Mn<jats:sub>x</jats:sub>Zn<jats:sub>y</jats:sub>Te melts decreased with increasing <jats:italic>x</jats:italic> (i.e. Mn content). The change of the melts holding time from 10 to 60 min has no effect on the supercooling values. Volume fraction of Cd<jats:sub>1‐x‐y</jats:sub>Mn<jats:sub>x</jats:sub>Zn<jats:sub>y</jats:sub>Te alloys clusters existing in the melt decreased with the holding temperature increasing. Full homogenization occurred only after of Cd<jats:sub>0.95‐x</jats:sub>Mn<jats:sub>x</jats:sub>Zn<jats:sub>0.05</jats:sub>Te melts superheating higher than 1385 K, below this temperature melts exist in semiliquid state. The volume fraction of the quasi‐solid phase is smaller if the melt was heated at 10 K/min than after heating at 5 K/min to the same temperature. Melting temperature of Cd<jats:sub>0.95‐x</jats:sub>Mn<jats:sub>x</jats:sub>Zn<jats:sub>0.05</jats:sub>Te alloys decreased with Mn content increasing. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</jats:p>