The low temperature specific heat of H0.40 CU0.37 Y0.23 amorphous alloy

الملخص EN

The low temperature specific heat parameters of the magnetic Ho0.40Cu0.37Y0.23 amorphous alloy have been investigated in the temperature range 2 to 50 K.

The magnetic contributions to the specific heat, magnetic entropy changes, ordering temperatures, and the effective magnetic spin have been estimated for this alloy.

The magnetic specific heat shows a broad shoulder with a characteristic temperature, Tm of about 23 K, followed at very lowtemperatures by a Schottky-type anomaly.

The value of Tm is higher than the freezing temperature, Tf (= 13 K) as determined by AC susceptibility measurements.

The magnetic entropy changes between 0 K and Tf (Tm) estimated to be 28 % (59 %) of the maximum theoretical value.

This indicates that a substantial amount of short range-order persists above these characteristic temperatures.

The behaviors of this amorphous alloy agree quite well with those of condensed rare earth amorphous systems.