NMR studies of the heavy fermion alloy Ce(Cu1-xNix)2Ge2
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Date
1996
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The American Physical Society
Abstract
A detailed 63Cu NMR investigation is presented for the heavy-fermion system Ce(Cu1-xNix)2Ge2, focusing especially on the alloying induced transition from magnetic order to pure Kondo-like behavior. The broadening of the resonance line and the temperature dependence of the spin-lattice relaxation rate 1/T1 are studied in full detail. We provide experimental evidence for the appearance of heavy-fermion band magnetism for concentrations x=0.6 and x=0.7. For x=0.8 the spin-lattice relaxation rate 1/T1 follows a logarithmic temperature dependence which we interpret as a fingerprint of a non-Fermi-liquid behavior. Finally, 1/T1 is compared to the dynamic structure factor S(Q,ω) as determined in inelastic-neutron-scattering experiments.
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Büttgen, N.; Böhmer, R.; Krimmel, A.; Loidl, A.: NMR studies of the heavy fermion alloy Ce(Cu1-xNix)2Ge2. In: Physical Review B Nr. 9, Jg. 53(1996), S. 5557-5562, doi: 10.1103/PhysRevB.53.5557.