Specific heat of Ce_{0.8}La_{0.2}Al_{3} in magnetic fields: a test of the anisotropic Kondo picture
arXiv:cond-mat/0007428 · doi:10.1103/PhysRevLett.86.1090
Abstract
The specific heat C of Ce_{0.8}La_{0.2}Al_{3} 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 C/T(T->0) increases with field over the range studied. We show that these trends are inconsistent with the anisotropic Kondo model.
4 pages, 5 figures, ReVTeX + epsf
Cited by in corpus (5)
- The numerical renormalization group method for quantum impurity systems
- Noncrossing Approximation for the Anisotropic Kondo Model: Charge Fluctuations in a Quantum Box
- Magnetic Correlations and the Anisotropic Kondo Effect in Ce1-xLaxAl3
- Theory for effects of pressure on heavy-fermion alloys
- muSR in Ce_{1-x}La_xAl_3: anisotropic Kondo effect?