First-principles study on the gilbert damping constants of transition metal alloys, Fe-Ni and Fe-Pt systems

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

We adapt the tight-binding linear muffin-tin orbital (TB-LMTO) method to the torque-correlation model for the Gilbert damping constant α and perform the first-principles calculation for disordered transition metal alloys, Fe-Ni and Fe-Pt systems, within the framework of the CPA. Quantitatively, the calculated α values are about one-half of the experimental values, whereas the variations in the Fermi level dependence of α are much larger than these discrepancies. As expected, we confirm in the (Fe-Ni) 1-XPt X and FePt systems that Pt atoms certainly enhance owing to their large spin-orbit coupling. For the disordered alloys, we find that decreases with increasing chemical degree of order in a wide range.

Original languageEnglish
Article number084701
Journaljournal of the physical society of japan
Volume81
Issue number8
DOIs
Publication statusPublished - 2012 Aug 1

Keywords

  • CPA
  • First-principles calculation
  • Gilbert damping constant
  • LMTO
  • Landau-Lifshitz-Gilbert equation
  • Spin relaxation
  • Spintronics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'First-principles study on the gilbert damping constants of transition metal alloys, Fe-Ni and Fe-Pt systems'. Together they form a unique fingerprint.

  • Cite this