Low temperature specific heats of very dilute alloys of Ce in Al |
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Authors: | O. P. Bansal J. A. Morrison E. L. Richards |
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Affiliation: | (1) Apartment 207, 1447 Dollard Avenue, H8N 1T3 LaSalle, Quebec, Canada;(2) Department of Physics and Institute for Materials Research, McMaster University, L8S 4M1 Hamilton, Ontario, Canada;(3) 66 Inkerman Road Woolston, S02 9DA Southampton, England |
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Abstract: | Measurements of the specific heat of two alloys of Ce (0.00275 and 0.0121 at % Ce) in Al have been made in the region 0.3<T<3.8 K. Within the limits of detection (<1 ppm), the alloys contained no metallic impurities other than Ce and their homogeneity was checked by neutron activation analysis. For the alloys in their normal electronic states, the change/c was found to be 6±3 and 3.5±1.5mJ/at% K2. The behavior of the alloys in their superconducting states (e.g.: the shift ofTc with the concentration of Ce; the correlation betweenTC/TC0 andC/C0) indicates the existence of short-lived local moments associated with the Ce impurities. |
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