THE NATURE OF Mn-Mn COUPLING IN Mn-Ni-Al ALLOYS

Authors

  • V. REDNIC National Institute for Research and Development of Isotopic and Molecular Technologies, P.O. Box 700, 400293 Cluj-Napoca, Romania. * Corresponding author: vasile.rednic@itim-cj.ro
  • M. COLDEA Babes-Bolyai University, Faculty of Physics, Kogalniceanu 1, 400084 Cluj-Napoca, Romania
  • V. POP Babes-Bolyai University, Faculty of Physics, Kogalniceanu 1, 400084 Cluj-Napoca, Romania
  • M. NEUMANN University of Osnabrück, Fachbereich Physik, 49069 Osnabrück, Germany

DOI:

https://doi.org/10.24193/subbphys.2021.10

Keywords:

exchange coupling, local magnetic moments, crystallographic structure, electronic structure.

Abstract

The occurrence of ferro - and antiferromagnetism in Mn-Ni-Al alloys is governed by the sign of the direct exchange interaction between the Mn magnetic ions. Experimentally has been found that, if the separation between the Mn magnetic ions is greater than the critical value dcr= 2.91 Å, they are ferromagnetic and if the distance is less than the critical value, they are antiferromagnetic. The value of Mn local magnetic moment depends on the number of Al atoms in the first vicinity but the dominant factor is the Mn-Al distance. The nature of Mn-Mn exchange coupling was studied through X-ray diffraction, magnetic and XPS measurements.

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STUDIA UBB PHYSICA, Volume 66 (LXVI), No. 1-2, December 2021

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Published

2021-12-30

How to Cite

REDNIC, V., COLDEA, M. ., POP, V., & NEUMANN, M. (2021). THE NATURE OF Mn-Mn COUPLING IN Mn-Ni-Al ALLOYS. Studia Universitatis Babeș-Bolyai Physica, 66(1-2), 111–120. https://doi.org/10.24193/subbphys.2021.10

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Volume 66, No. 1-2, 2021

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Articles

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