Magnetic and Electrical Properties of Ni (As_XS_<1-x>)_2

概要

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Magnetic, electrical and structural properties of Ni (As.S, ,). for 0<x<0.5 wereinvestigated experimentally. The magnetic transition points, N5el and Curie ponnts, andthe metallic and nonmetallic regions were determined as a function of concentratuonand temperature. The critical concentration for the magnetic and electrical transitionsat absolute zero was given to be x=O.22. The phase diagram thus obtained can beinterpreted qualitatively by the Hubbard model, in which the parameters of transferintegral, Coulombs' correlation and electron numbers in e. band are contained.Furthermore, the behavior of electrical resistivity can be explained by the spinfluctuation theory. Finally, a general view of the phase diagram of solid solutionsamong pyrite type compounds is summarized from the same standpoint.
社団法人日本物理学会の論文
1977-09-15