Abstract
Specific heat measurements between 0.5 and 4.2°K are reported for the system ( La , Gd) Al 2 in both the superconducting and normal state. The observed specific heat jump at the superconducting transition temperature T c is in excellent agreement with the Abrikosov-Gor'kov (AG) theory. This is in accordance with the previously reported close correspondence of the T c vs. Gd concentration curve with the AG theory. Two very interesting features occur in the normal state specific heat. First, the Gd impurities cause a surprisingly strong enhancement of the electronic specific heat coefficient. Second, there is a large magnetic field dependent Schottky-like anomaly at low temperatures. This anomaly persists even in the superconducting state.
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