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Total energy calculations for systems with magnetic and chemical disorder
Department of Neutron Research, Ångström Laboratory, Uppsala University.ORCID iD: 0000-0002-2381-3309
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.ORCID iD: 0000-0003-2832-3293
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2006 (English)In: Computational materials science, ISSN 0927-0256, E-ISSN 1879-0801, Vol. 35, no 1, 1-5 p.Article in journal (Refereed) Published
Abstract [en]

The accuracy of the exact muffin-tin orbitals method combined with the coherent potential approximation (EMTO-CPA) for total energy calculations for systems with magnetic and chemical disorder, which is present simultaneously, is investigated. The mixing enthalpy of ordered, as well as disordered FeCo, FeNi, and FeCu equiatomic ferromagnetic alloys is calculated with the EMTO-CPA method and with the full-potential projector augmented wave (PAW) method. The results are compared and found to be in excellent agreement with each other. The EMTO-CPA method, in combination with disordered local moment model, is then applied to calculate the mixing enthalpy of the random paramagnetic face-centered cubic (fcc) FeCo alloy, as well as body-centered cubic (bcc) FeCr and FeV alloys over the whole concentration range. The results are compared with experimental data and a very good agreement is found again.

Place, publisher, year, edition, pages
2006. Vol. 35, no 1, 1-5 p.
Keyword [en]
exact muffin-tin orbitals method, coherent potential approximation, mixing energies, local moments disorder, coherent-potential-approximation, ground-state properties, wave basis-set, ab-initio, alloys, metals, cu, ni
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-15344DOI: 10.1016/j.commatsci.2005.04.001ISI: 000232455000001Scopus ID: 2-s2.0-25144438541OAI: oai:DiVA.org:kth-15344DiVA: diva2:333385
Note
QC 20100525 QC 20120123Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Olsson, PärVitos, Levente

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