Low Temperature Specific Heat Of Thgd Spin Glass

The specific heat measurements of ThGd alloys, with Gd concentration ranging from 0.15% to 10.8% and temperatures between 0.4 and 8 K, are reported. The characteristic spin glass specific heat enhancement and its maximum was found linearly proportional to Gd concentration. At low temperatures a T2 dependence of the specific heat was observed and the entropy associated with the magnetic ordering was the 70% of the expected value for the spin S = 7 2. © 1979.299671673Ruderman, Kittel, (1954) Phys. Rev., 96, p. 99Coles, (1973) Amorphous Magnetism, p. 169. , Plenum Press, New YorkAnderson, (1973) Amorphous Magnetism, p. 1. , Plenum Press, New YorkMydosh, (1978) J. Mag. Magn. Mater., 7, p. 237Allain, Bonnerot, Caroli, Jesser, Raphael, Chaleur spécifique et susceptibilité magnétique des solutions solides diluées d'yttrium-gadolinium (1967) Journal de Physique, 28, p. 98Phillips, Matthias, Heat Capacity of Ferromagnetic Superconductors (1961) Physical Review, 122, p. 105Isaacs, (1973) Phys. Rev., 8 B, p. 3301Child, Koehler, Millhouse, (1968) J. Appl. Phys., 39, p. 1329Hennepof, Leenstra, (1972) Physica, 62, p. 155J. Sereni, Unpublished PhD. Thesis, Universidad de Cuyo (1976)Satoh, Kumagai, (1973) J. Phys. Soc. Japan, 34, p. 391Klein, (1968) Phys. Rev., 173, p. 552. , and refs. thereinThouless, Anderson, Palmer, Solution of 'Solvable model of a spin glass' (1977) Philosophical Magazine, 35, p. 593Sherrington, Kirkpatrik, (1975) Phys. Rev. Lett., 35, p. 1792Souletie, Tournier, (1969) J. Low Temp. Phys., 1, p. 95Luengo, Maple, (1973) Solid State Commun., 12, p. 75