Design of solid solutions with perovskite and K2NiF4 structures as substrate with tunable lattice parameters for HTSC and CMR epitaxy

Marek Berkowski; J. Fink-Finowicki; W. Piekarczyk; L. Perchuc; Krystyna Mazur; Jerzy Sass; L. O. Vasylechko; D. I. Savytskij

doi:10.1117/12.342962

24 March 1999 Design of solid solutions with perovskite and K₂NiF₄ structures as substrate with tunable lattice parameters for HTSC and CMR epitaxy

Marek Berkowski, J. Fink-Finowicki, W. Piekarczyk, L. Perchuc, Krystyna Mazur, Jerzy Sass, L. O. Vasylechko, D. I. Savytskij

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Proceedings Volume 3724, International Conference on Solid State Crystals '98: Single Crystal Growth, Characterization, and Applications; (1999) https://doi.org/10.1117/12.342962
Event: International Conference on Solid State Crystals '98, 1998, Zakopane, Poland

Abstract

Suitability of various materials with the perovskite and K₂NiF₄ structures as substrates for the epitaxy of high temperature superconductors (HTSC) and manganite perovskites with colossal magneto resistance (CMR) is studied. In particular, the analysis concentrates on solid solutions in LaGaO₃-NdGaO₃ and SrLaGaO₄-SrLaAlO₄ systems. The aim of the present investigation is to test the possibility of obtaining LaGaO₃-NdGaO₃ solid solutions with cubic structure. Single crystal growth of LaGaO₃-NdGaO₃ solid solutions in a selected NdGaO₃ concentration range has been investigated. It allows us to estimate the segregation coefficient for Nd in La_1-xNd_xGaO₃. Unit-cell parameters as a function of composition have been determined. Single crystal growth of SrLaGaO₄-SrLaAlO₄ solid solutions has also been investigated. The optimum starting melt composition, the segregation coefficients for Ga in SrLaAlO₄ and Al in SrLaGaO₄ as well as the unit-cell parameters as a function of composition have been determined. Both LaGaO₃-NdGaO₃ and SrLaGaO₄-SrLaAlO₄ solid solutions are suitable substrate materials for HTSC and CMR perovskite epitaxy. Since their lattice parameters can smoothly be adjusted to those of deposited layers, the presented solid solutions are attractive substrate materials with tunable lattice parameters.

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Marek Berkowski, J. Fink-Finowicki, W. Piekarczyk, L. Perchuc, Krystyna Mazur, Jerzy Sass, L. O. Vasylechko, and D. I. Savytskij "Design of solid solutions with perovskite and K₂NiF₄ structures as substrate with tunable lattice parameters for HTSC and CMR epitaxy", Proc. SPIE 3724, International Conference on Solid State Crystals '98: Single Crystal Growth, Characterization, and Applications, (24 March 1999); https://doi.org/10.1117/12.342962

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