Abstract
In an effort to compare the spin glass characteristics of yttrium–rare earth alloys with those of the noble-metal spin glasses, the susceptibility and heat capacity of Y0.98Dy0.02 have been measured in the temperature range 2.5–40 K. The low-field ac susceptibility measurement shows the characteristic cusp-like peak at 7.64 K. The magnetic specific heat of the same sample shows a peak at 7.0 K and may be qualitatively described as a semi-cusp. The magnetic entropy change from absolute zero to 7 K is approximately 0.52 of cR ln(2J+1). These results are qualitatively different than previous calorimetric results on the archetypal spin glasses, AuFe and CuMn, where rounded maxima are observed at temperatures above the spin glass transition temperatures.
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