The growth and characterization of single grains of the primitive icosahedral quasicrystal R - Mg - Cd ( R = Y, Gd, Tb or Dy) are described. From the thermodynamic properties, it is confirmed that the system is a spin glass exhibiting the characteristic spin-freezing transition of such systems. There is no evidence for two distinct freezing transitions previously observed for polygrain samples. The bulk magnetic properties and the effect of crystalline electric fields on the spin-freezing temperature are found to be very similar to those of the face-centred icosahedral quasicrystal R - Mg - Zn.
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Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, RussiaMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, Russia
Morozkin, A. V.
Carvalho, Lindomar
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Univ Brasilia, ICCMP, BR-70904970 Brasilia, DF, BrazilMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, Russia
Carvalho, Lindomar
Nirmala, R.
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Indian Inst Technol, Madras 600036, Tamil Nadu, IndiaMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, Russia
Nirmala, R.
Malik, S. K.
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Univ Brasilia, ICCMP, BR-70904970 Brasilia, DF, BrazilMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, Russia
Malik, S. K.
Isnard, O.
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Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
CNRS, Inst Neel, F-38042 Grenoble, France
Univ Grenoble 1, F-38042 Grenoble, FranceMoscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, Russia