Research Papers in Physics and Astronomy

 

Date of this Version

2012

Document Type

Article

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.

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