Abstract

The de Haas-van Alphen effect has been studied in CeAl2 at temperatures down to 17mK. Some features of the results are found to bear a strong resemblance to those in LaAl2 suggesting that the f-electrons in CeAl2 are well localized and, whilst strongly influencing low-energy quasiparticle excitations, they do not contribute significantly to the Fermi surface topology. Quasiparticle effective masses in CeAl2 are measured in the range 1.1 to 16.2m0, and reveal an anisotropic enhancement of between 5 and 10 over the corresponding values in LaAl2. The results are compared with measurements of the heat capacity, photoemission and with recent electronic structure calculations.

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