Institute of Experimental Physics
Topic
Single-directional growth of REBCO bulk crystals, structure and superconducting properties
PhD. program
Advanced materials
Year of admission
2025
Name of the supervisor
Ing. Pavel Diko, DrSc., akademik US Slovenska
Contact:
Receiving school
Faculty of Science, P.J. Safarik University
Annotation
The topic is focused on the preparation of REBCO (REBCO stands for the compound REBa2Cu3O7, where RE is Y or a rare earth) bulk single-crystal superconductors (BSS) by single-direction melt-growth (SDMG) from a large-area seed and the study of their microstructure and superconducting properties. SDMG technology has only recently been developed [1,2] and represents a significant advance in the preparation of REBCO BSS for practical applications, as it allows the preparation of large-sized crystals with complicated geometry. Growth of bulk REBCO crystals, structural analysis and measurement of macroscopic superconducting properties will be performed on the equipment of the Department of Materials Physics IEP SAS using crucible-free crystal growth methods, X-ray diffraction, optical and electron microscopy, measurement of the trapped magnetic field and levitation force at 77 K. Magnetization measurements will be performed on the equipment of the Institute of Experimental Physics. The topic falls within the framework of the project APVV-21-0387, REBCO bulk superconductors based on Y, Gd, Sm and Eu for practical applications, Principal investigator: P. Diko.
Literature:
[1] T. Motoki, R. Sasada, T. Tomihisa, M. Miwa, S. Nakamura, J. Shimoyama, Development of homogeneous and high-performance REBCO bulks with various shapes by the single-direction melt-growth (SDMG) method, Superconducting Science and Technology 35 (2022), 094003.
[2] P. Diko, K. Zmorayová, T. Motoki, J. Shimoyama, Microstructure of DyBCO bulk superconductors prepared using single-direction melt-growth (SDMG) method, Ceramics International 49 (2023), 39280-39288.
Literature:
[1] T. Motoki, R. Sasada, T. Tomihisa, M. Miwa, S. Nakamura, J. Shimoyama, Development of homogeneous and high-performance REBCO bulks with various shapes by the single-direction melt-growth (SDMG) method, Superconducting Science and Technology 35 (2022), 094003.
[2] P. Diko, K. Zmorayová, T. Motoki, J. Shimoyama, Microstructure of DyBCO bulk superconductors prepared using single-direction melt-growth (SDMG) method, Ceramics International 49 (2023), 39280-39288.