Magnetization, Lattice Constants and Hydrostatic Pressure Effect on the Curie Temperature of (Co_<1-x>Mn_x)_2B

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Measurements of the magnetization, lattice constants and hydrostatic pressureeffect on the Curie temperature T. were carried out on the compounds(Coj ,Mn,).B, 0$,v$ [. The cornpounds were ferromagnetic when .x<0.6 andparamagnetic when 0.6<,v:( 1. The magnetization at 4.2 K and T. were analysedon the basis of the pair interaction model and the local environment effect,on the assumption that the central Co atom loses the moment or the moment ofMn is antipa.ra]]el to the neighboring Mn atoms, when the numbers of neighborMn atoms are more than seven. The composition dependence of lattice constantsa and c did not follow the Vegard's law, and was explained by the magneticcontribution. The data on the pressure effect on T. shows relatively large con-tribution of the Mn-Mn pair to the exchange interaction.
社団法人日本物理学会の論文
1979-10-15