Institute of Experimental Physics
Topic
New superconductors based on high entropy alloys
PhD. program
Physical engineering of advanced materials
Name of the supervisor
doc. RNDr. Karol Flachbart, DrSc., akademik US Slovenska
Contact:
Receiving school
Faculty of Electrical Engineering and Informatics, Technical University in Košice
Annotation
High-entropy alloys (HEAs) represent a relatively new class of materials, which has recently been the subject of considerable interest in both basic and applied research. These alloys consist of several constituent elements (4 - 6), while individual elements occupy lattice positions with a high degree of disorder, i.e. with high configurational entropy. Superconductivity of HEAs, with transition temperature Tc up to approx. 10 K and a critical magnetic field up to approx. 20 T, is very stable and resistant to various chemical and mechanical influences.
The topic of the proposed dissertation will be the preparation and research of the properties of new superconductors based on HEAs. These will include HEAs, which will incorporate light elements, e.g. nitrogen, carbon or hydrogen, which will lead to changes in their superconducting properties. The first results presented in work [1] e.g. show that the incorporation of nitrogen into HEAs leads to an eightfold increase in the transition temperature Tc.
Research in the framework of the dissertation will be carried out in the Center of Low Temperature Physics of the Institute of Experimental Physics of the SAS, which has all the necessary infrastructure at its disposal.
[1] G. Pristáš, ..., K. Flachbart, Multiple transition temperature enhancement in superconducting TiNbMoTaW high entropy alloy films through tailored N incorporation, Acta Mater. 262 (2024) 119428. IF = 9.4
The topic of the proposed dissertation will be the preparation and research of the properties of new superconductors based on HEAs. These will include HEAs, which will incorporate light elements, e.g. nitrogen, carbon or hydrogen, which will lead to changes in their superconducting properties. The first results presented in work [1] e.g. show that the incorporation of nitrogen into HEAs leads to an eightfold increase in the transition temperature Tc.
Research in the framework of the dissertation will be carried out in the Center of Low Temperature Physics of the Institute of Experimental Physics of the SAS, which has all the necessary infrastructure at its disposal.
[1] G. Pristáš, ..., K. Flachbart, Multiple transition temperature enhancement in superconducting TiNbMoTaW high entropy alloy films through tailored N incorporation, Acta Mater. 262 (2024) 119428. IF = 9.4