The European Physical Journal B

, Volume 77, Issue 1, pp 31–40 | Cite as

Quasiparticle dynamics in ferromagnetic compounds of the Co–Fe and Ni–Fe systems

Solid State and Materials

Abstract

We report a theoretical study of the quasiparticle lifetime and the quasiparticle mean free path caused by inelastic electron-electron scattering in ferromagnetic compounds of the Co–Fe and Ni–Fe systems. The study is based on spin-polarized calculations, which are performed within the G0W0 approximation for equiatomic and Co(Ni)-rich compounds, as well as for their constituents. We mainly focus on the spin asymmetry of the quasiparticle properties, which leads to the spin-filtering effect experimentally observed in spin-dependent transport of hot electrons and holes in the systems under study. By comparing with available experimental data on the attenuation length, we estimate the contribution of the inelastic mean free path to this length.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  1. 1.Department of Theoretical PhysicsNekrasov Kostroma State UniversityKostromaRussia
  2. 2.Research-Education Center “Physics and Chemistry of High-Energy Systems”, Tomsk State UniversityTomskRussia
  3. 3.Donostia International Physics Center (DIPC)San SebastiánSpain
  4. 4.Departamento de Física de Materiales, Facultad de Ciencias QuímicasSan SebastiánSpain
  5. 5.Centro de Física de Materiales CFM-Materials Physics Center MPC, Centro Mixto CSIC-UPV/EHUSan SebastiánSpain

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