Phys. Rev. Lett. 86, 1090–1093 (2001)Specific Heat of Ce0.8La0.2Al3 in Magnetic Fields: A Test of the Anisotropic Kondo PictureReceived 7 July 2000; published in the issue dated 5 February 2001 The specific heat C of Ce0.8La0.2Al3 has been measured as a function of temperature T in magnetic fields up to 14 T. A large peak in C at 2.3 K has recently been ascribed to an anisotropic Kondo effect in this compound. A 14-T field depresses the temperature of the peak by only 0.2 K, but strongly reduces its height. The corresponding peak in C/T shifts from 2.1 K at zero field to 1.7 K at 14 T. The extrapolated specific heat coefficient γ = limopT→0C/T increases with field over the range studied. We show that these trends are inconsistent with the anisotropic Kondo model. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.1090
DOI:
10.1103/PhysRevLett.86.1090
PACS:
75.20.Hr, 75.30.Mb, 75.40.Cx
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