Abstract
The paramagnetic spin-disorder resistivity (SDR) of transition-metal ferromagnets Fe, Co, Ni, ordered transition metal alloys NiMn and FeSi as well as NiMn (,Sn,Sb) Heusler alloys is determined from first principles. SDR is evaluated similar to the residual resistivity by using the disordered local moment (DLM) model combined with the Kubo-Greenwood linear response calculation. The electronic structure is determined within the tight-binding linear muffin-tin orbital method and the coherent potential approximation (CPA) applied to the DLM state. We also estimate the temperature dependence of the resistivity below the Curie temperature using a simple model. The results agree well with the supercell Landauer-Büttiker calculations and, generally, with experimental data. For the NiMnSb Heusler alloy it is necessary to include substitutional disorder of B2-type to explain the experimental data.
- Received 26 July 2012
DOI:https://doi.org/10.1103/PhysRevB.86.144423
©2012 American Physical Society