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Competing magnetic correlations across the ferromagnetic quantum critical point in the Kondo system CeTi1-x VxGe3: V 51 NMR as a local probe
, W. Kittler, V. Fritsch, H. L{\"{o}}hneysen V., H. Yasuoka, M. Baenitz
Published in
Volume: 100
Issue: 13
V51 nuclear magnetic resonance (NMR) and magnetization studies on CeTi1-xVxGe3 have been performed to explore the evolution from the ferromagnetic (x=0.113) to the antiferromagnetic Kondo lattice state (x=1), with focus on the emergence of a possible ferromagnetic quantum critical point (FMQCP) at xc≈0.4. From the temperature dependence of the nuclear spin-lattice relaxation rate, 1/T1T and the Knight shift, K, for x=0.113 and x=1 a considerable competition between ferro- A nd antiferromagnetic correlations is found. Around the critical concentration (x=0.35,0.405), quantum-critical spin fluctuations entail weak antiferromagnetic spin fluctuations admixed with ferromagnetic spin fluctuations. The FMQCP in CeTi1-xVxGe3 therefore is not purely ferromagnetic in nature.
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