メカニカルアロイング法により作製したFeCu-N, Fe-Au-Cu-N 合金の磁性

抄録

  The aim of this study is to examine the effect of doped N and Au on the lattice parameter and the magnetic properties of FCC Fe-Cu alloys, prepared by mechanical alloying. By the measurements of X-ray diffraction, it is shown that both N and Au extend the FCC lattice. The magnetic moment and the Curie temperature of Fe-Cu-N alloys decreased drastically with increasing N content, but the magnetic moment and the Curie temperature of Fe-Au-Cu-N alloys increased with increasing Au. Analysis based on a molecular field approximation shows the exchange integral is not affected by the addition of Au, but strongly affected by the addition of N. The fact is interpreted as the result that the latter changes not only the lattice parameter but also the band structure of the alloys.