LONG-RANGE MAGNETIC-IMPURITIES IN GAMMA-MNCU ALLOYS


LONG M., BAYRI A.

JOURNAL OF PHYSICS-CONDENSED MATTER, cilt.5, 1993 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 5 Konu: 2
  • Basım Tarihi: 1993
  • Doi Numarası: 10.1088/0953-8984/5/2/001
  • Dergi Adı: JOURNAL OF PHYSICS-CONDENSED MATTER

Özet

Gamma-Mn alloys show a host of antiferromagnetic phase transitions. Recently it has been suggested that the alloy disorder causes these phase transitions by locally trapping 'islands' of non-collinear spin density. Practical experimental studies of this possibility have previously been reported in the literature, employing magnetic diffuse scattering. Although basic agreement was obtained for some alloys, gamma-Mn(1-x)Cu(x) exhibited spectacular effects which have so far proven rather difficult to explain: so-called 'giant staggered moments'. We present a model which successfully predicts the magnetic diffuse scattering and explains the special behaviour observed in gamma-Mn(1-x)Cu(x) as arising from the local clustering of copper impurities.