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Exchange interactions in paramagnetic amorphous and disordered crystalline CrN-based systems
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, The Institute of Technology.
University of Austral Chile, Chile.
University of Austral Chile, Chile.
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, The Institute of Technology.
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2013 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 88, no 5Article in journal (Refereed) Published
Abstract [en]

We present a first principles supercell methodology for the calculation of exchange interactions of magnetic materials with arbitrary degrees of structural and chemical disorder in their high temperature paramagnetic state. It is based on a projection of the total magnetic energy of the system onto local pair clusters, allowing the interactions to vary independently as a response to their local environments. We demonstrate our method by deriving the distance dependent exchange interactions in vibrating crystalline CrN, a Ti0.5Cr0.5N solid solution as well as in amorphous CrN. Our method reveals strong local environment effects in all three systems. In the amorphous case we use the full set of exchange interactions in a search for the noncollinear magnetic ground state.

Place, publisher, year, edition, pages
American Physical Society , 2013. Vol. 88, no 5
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Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-97443DOI: 10.1103/PhysRevB.88.054414ISI: 000323328000006OAI: oai:DiVA.org:liu-97443DiVA: diva2:647851
Note

Funding Agencies|Swedish Research Council (VR)|621-2011-4417621-2011-4426|Swedish Foundation for Strategic Research (SSF) program|SRL 10-0026|FONDECYT|11106021120334|

Available from: 2013-09-12 Created: 2013-09-12 Last updated: 2017-12-06

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Lindmaa, AlexanderAbrikosov, IgorAlling, Björn

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