Tuning the Curie temperature of FeCo compounds by tetragonal distortion
2013 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 103, no 10, 102404- p.Article in journal (Refereed) Published
Combining density-functional theory calculations with a classical Monte Carlo method, we show that for B2-type FeCo compounds, tetragonal distortion gives rise to a strong reduction of the Curie temperature T-C. The T-C monotonically decreases from 1575K (for c/a = 1) to 940K (for c/a = root 2). We find that the nearest neighbor Fe-Co exchange interaction is sufficient to explain the c/a behavior of the T-C. Combination of high magnetocrystalline anisotropy energy with a moderate TC value suggests tetragonal FeCo grown on the Rh substrate with c/a = 1.24 to be a promising material for heat-assisted magnetic recording applications.
Place, publisher, year, edition, pages
2013. Vol. 103, no 10, 102404- p.
IdentifiersURN: urn:nbn:se:uu:diva-211902DOI: 10.1063/1.4819773ISI: 000324389700031OAI: oai:DiVA.org:uu-211902DiVA: diva2:669371