Half-metallicity and Gilbert damping constant in Co2 Fex Mn1-x Si Heusler alloys depending on the film composition

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Abstract

Transport properties in magnetic tunnel junctions (MTJs) with Co2 Fex Mn1-x Si (CFMS, x=0-1.0) /Al-O/ Co75 Fe25 structure and Gilbert damping constant in the epitaxial CFMS films were investigated. The tunnel magnetoresistance ratio is as high as 75% in MTJs with x=0.6 at room temperature. The Gilbert damping constant is minimal at x=0.4. Relations between half-metallicity and the Gilbert damping constant in CFMS films were examined, revealing that the damping constant is small in half-metallic CFMS films.

Original languageEnglish
Article number122504
JournalApplied Physics Letters
Volume94
Issue number12
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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