Abstract
Magnetism in CoCrFeMnNi Based High Entropy Alloys The high entropy alloys (HEA) represent promising materials for industrial application thanks to the variability of their properties. In comparison to classical alloys HEAs are composed from a higher number of constituents, which not only offers the possibility to tune the properties, but also brings the stabilization of the alloys by the high entropy in high temperatures, in general.
In our study we are focusing on ground state properties of CoCrFeMnNi so-called 'Cantors alloy', the well known example of HEA. Since we are pointing out especially on its magnetic behavior, we studied its derivatives based on the non-magnetic substitution by molybdenum as well.
It helped us to explore the relations between constituting elements and resulting magnetic properties. We show how the non-magnetic substitution in parent alloy and crystal structure influence the ground state properties and the preferred magnetic state in particular.
Furthermore, by calculating the exchange interactions and with respect to the chemical disorder we discuss the contribution of the each constituent element to the magnetic behavior. Finally we try to suggest a route to stabilize the particular alloy and its magnetic ordering.
Acknowledgement: This work was supported by the European Regional Development Fund in the IT4Innovations national supercomputing center - path to exascale project, project number CZ.02.1.01/0.0/0.0/16_013/0001791 within the Operational Program Research, Development and Education and grant No. 17-23964S of the Czech Science Foundation and Mobility project No.8J18AT004. [1] J. Šebesta, K. Carva, and D.
Legut, Role of the magnetism in a stability of CoCrFeMnNi and its derivatives. (submitted to Phys. Rev.
Matterial)