TY - JOUR
T1 - Field-induced transition from non-Fermi-liquid state to heavy Fermion state in Ce0.5La0.5B6
AU - Nakamura, S.
AU - Endo, M.
AU - Aoki, H.
AU - Kimura, N.
AU - Nojima, T.
AU - Kunii, S.
PY - 2003/1/1
Y1 - 2003/1/1
N2 - Measurements of the electrical resistivity, specific heat, and dHvA oscillations have been made on a cubic Kondo system Ce0.5La0.5B6 with a Γ8 ground state at very low temperatures. In the paramagnetic phase I which appears in lower fields, the electrical resistivity deviates from the formula ρ(T)=ρ(0)+AT2 below ∼300 mK, implying an appearance of non-Fermi-liquid (NFL) state. In the field induced antiferromagnetic phase III, the large γ coefficient in the specific heat and the large coefficient A in the electrical resistivity have been found, indicating a heavy fermion (HF) state. The coefficient A diverges when the field approaches the phase III–phase I transition point. On the other hand, by increasing the Ce concentration phase IV with a long range order appears and a HF state is found to be formed there. We argue that the origin of the NFL behavior is related with the quadrupolar moment.
AB - Measurements of the electrical resistivity, specific heat, and dHvA oscillations have been made on a cubic Kondo system Ce0.5La0.5B6 with a Γ8 ground state at very low temperatures. In the paramagnetic phase I which appears in lower fields, the electrical resistivity deviates from the formula ρ(T)=ρ(0)+AT2 below ∼300 mK, implying an appearance of non-Fermi-liquid (NFL) state. In the field induced antiferromagnetic phase III, the large γ coefficient in the specific heat and the large coefficient A in the electrical resistivity have been found, indicating a heavy fermion (HF) state. The coefficient A diverges when the field approaches the phase III–phase I transition point. On the other hand, by increasing the Ce concentration phase IV with a long range order appears and a HF state is found to be formed there. We argue that the origin of the NFL behavior is related with the quadrupolar moment.
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U2 - 10.1103/PhysRevB.68.100402
DO - 10.1103/PhysRevB.68.100402
M3 - Article
AN - SCOPUS:0142184904
VL - 68
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 10
ER -