Calculation of the exchange integrals for Co1-x Ni x alloy by Korring-Kohn-Rostoker method

In this work we investigate the cobalt-nickel alloy magnetic properties. Calculations of lattice constants for Co, Ni and Co1-x Ni x alloy with different concentrations were performed with the VASP framework. Calculations of the exchange integrals were carried out using the SPR-KKR package (spin-pol...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-11, Vol.1389 (1)
Main Authors: Budko, Sergey N, Mamonova, Marina V
Format: Article
Language:English
Subjects:
Antiferromagnetism
Cobalt base alloys
Exchanging
Ferromagnetism
Integrals
Lattice parameters
Magnetic properties
Magnetism
Mathematical analysis
Nickel
Physics
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Summary:In this work we investigate the cobalt-nickel alloy magnetic properties. Calculations of lattice constants for Co, Ni and Co1-x Ni x alloy with different concentrations were performed with the VASP framework. Calculations of the exchange integrals were carried out using the SPR-KKR package (spin-polarized relativistic Korring-Kohn-Rostoker method). For pure ferromagnets, the Co exchange interaction is ferromagnetic. For Ni, the exchange interaction of the nearest neighbors also is ferromagnetic, but the exchange interaction of the next nearest neighbors has a very weak antiferromagnetic character. In the Co1-x Ni x alloy, the exchange interaction of the nearest neighbors J Ni–Co 1 and J Co–Co 1 increases with increasing nickel concentration. The next nearest neighbors exchange interaction at a concentration of Ni x ≥ 0.5 has an antiferromagnetic character.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1389/1/012144