Spin-disorder resistivity of ferromagnetic metals from first principles: The disordered-local-moment approach

Authors

Josef Kudrnovsky, Institute of Physics, Academy of Sciences of the Czech RepublicFollow
V. Drchal, Institute of Physics, Academy of Sciences of the Czech Republic
Ilja Turek, Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter PhysicsFollow
Sergii Khmelevskyi, CMS, Institute of Applied Physics, Vienna University of TechnologyFollow
James K. Glasbrenner, University of Nebraska-LincolnFollow
Kirill D. Belashchenko, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2012

Citation

PHYSICAL REVIEW B 86, 144423 (2012)

Comments

©2012 American Physical Society

Abstract

The paramagnetic spin-disorder resistivity (SDR) of transition-metal ferromagnets Fe, Co, Ni, ordered transition metal alloys Ni₃Mn and Fe₃Si as well as Ni₂MnX (X = In,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-Buttiker calculations and, generally, with experimental data. For the Ni₂MnSb Heusler alloy it is necessary to include substitutional disorder of B2-type to explain the experimental data.