Hyperfine Fields at ^<51>V in Heusler Alloys Co_2T<1-x>V_xGa (T=Ti,Cr,Mn,Fe) and Estimation of Magnetic Moments of the Constituent Atoms

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The hyperfine fields H.( in the ferromagnetic alloys Co.7-. ..V.Ga (T= Ti, Cr, Mn,Fe) were measured by NMR spin-echo technique at 4.2 K as a function of x. H,.,?(Y)on V impurity at b sites (,v:0) was determined to be -41, -40*2, -15 and-3883 k0e for 7'=Ti, Cr, Mn and Fe, respectively. We estimated from thesevalues, assuming V to be non magnetic, the magnetic moments of the atoms inCo.CrGa and Co.FeGa with the use of the measured saturation moments. It wasfound that for the two alloys the same moments were obtained also from #,..(Mn) onMn impurity instead of V by assuming that the magnetic moment of Mn impurity inthese alloys is the same as the Mn moment in Co.MnGa. The estimated moments ofCr and Fe were found to be consistent with #.j(Co).[hyperfine field, nuclear magnetic resonance, Co.TiGa, Co.VGa, Co.CrGa, ll Co.MnGa, Co.FeGa, Heusler alloysl
社団法人日本物理学会の論文
1990-12-15