AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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STUDIA PHYSICA - Issue no. 2 / 2009 | |||||||
Article: |
MAGNETIC STATES IN Co RICH FCC CoMn ALLOYS. Authors: V. CRISAN. |
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Abstract: We report on the results of the ab initio calculations on the Co0.95Mn0.05 alloy in chemically disordered state. Calculations are carried out within density-functional theory and the coherent potential approximation (CPA). We show that the magnetic coupling between the Co and Mn atoms are of ferromagnetic (FM) type for large lattice parameters while for lower ones are antiferromagnetic (AF). The coupling between Mn atoms is found to be FM for all lattice parameters. No chemically ordering is seen, all sites in the fcc unit cell being magnetically equivalent. The results are discussed in the framework of the disordered local moment (DLM) model. Keywords: alloys, transition-metal KKR, CPA, DLM |
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