Abstract
The growth kinetics of LSCO and YBCO single crystals from high temperature solution of LSCO-CuO solute-solvent and YBCO-CuO solute-solvent systems has been investigated. Based on regular solution model and classical nucleation theory, the thermodynamical data investigated for the systems are used to determine the nucleation parameters: interfacial free energy, metastable zone-width, volume free energy, critical energy barrier for nucleation and radius of critical nucleus for LSCO and YBCO which leads to the understanding of the nucleation phenomena of LSCO and YBCO.
Highlights
The important renewable method of growing single crystals of La2Sr2CuO4 (LSCO) and YBa2Cu2O7−δ (YBCO) is the high temperature solution using LSCO-CuO [1]-[3] and BaO-CuO [4]-[6] as flux respectively
In the present work this expression is used to calculate the interfacial energy of LSCO crystal from the solubility data of the LSCO-CuO binary phase diagram (Figure 1) and of YBCO crystal of BaO-CuO quasi-binary phase diagram (Figure 2)
The value of −∆Hs R is calculated from the data of LSCO solute in LSCO-CuO solvent solubility curve (Figure 1) and YBCO solute in BaO-CuO (Figure 2)
Summary
The important renewable method of growing single crystals of La2Sr2CuO4 (LSCO) and YBa2Cu2O7−δ (YBCO) is the high temperature solution using LSCO-CuO [1]-[3] and BaO-CuO [4]-[6] as flux respectively. The binary phase diagram of the solute-solvent system is very essential to grow LSCO and YBCO crystals from flux technique. The high temperature solution growth techniques require the knowledge of the essential nucleation thermodynamical parameters like interfacial energy, metastable zone-. (2016) Estimation of Nucleation Thermodynamical Parameters of La2Sr2CuO4 (LSCO) and YBa2Cu2O7−δ (YBCO) Crystallizing from High Temperature Solution. In this paper the regular solution model has been adopted to calculate the nucleation parameters of LSCO and YBCO for the first time
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