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Title: Effects of Ga substitution on the structural and magnetic properties of half metallic Fe{sub 2}MnSi Heusler compound

The so-called half-metallic magnets have been proposed as good candidates for spintronic applications due to the feature of exhibiting a hundred percent spin polarization at the Fermi level. Such materials follow the Slater-Pauling rule, which relates the magnetic moment with the valence electrons in the system. In this paper, we study the bulk polycrystalline half-metallic Fe{sub 2}MnSi Heusler compound replacing Si by Ga to determine how the Ga addition changes the magnetic, the structural, and the half-metal properties of this compound. The material does not follow the Slater-Pauling rule, probably due to a minor structural disorder degree in the system, but a linear dependence on the magnetic transition temperature with the valence electron number points to the half-metallic behavior of this compound.
Authors:
; ; ; ; ; ; ; ;  [1] ;  [2] ;  [3] ;  [4]
  1. Instituto de Física, Universidade Federal Fluminense, Niterói-RJ (Brazil)
  2. IF Sudeste MG, Campus Juiz de Fora - Núcleo de Física, Juiz de Fora-MG (Brazil)
  3. Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas - Unicamp, Campinas-SP (Brazil)
  4. Laboratório Nacional de Luz Sincrotron, CNPEM, Campinas-SP (Brazil)
Publication Date:
OSTI Identifier:
22399199
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ELECTRONS; FERMI LEVEL; GALLIUM; HEUSLER ALLOYS; IRON COMPOUNDS; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; MAGNETS; MANGANESE SILICIDES; POLYCRYSTALS; SPIN ORIENTATION; TRANSITION TEMPERATURE; VALENCE