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Competing magnetic correlations across the ferromagnetic quantum critical point in the Kondo system CeTi1-xVxGe3: 51V NMR as a local probe

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Majumder,  M.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Yasuoka,  H.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Baenitz,  M.
Michael Baenitz, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Majumder, M., Kittler, W., Fritsch, V., v Loehneysen, H., Yasuoka, H., & Baenitz, M. (2019). Competing magnetic correlations across the ferromagnetic quantum critical point in the Kondo system CeTi1-xVxGe3: 51V NMR as a local probe. Physical Review B, 100(13): 134432, pp. 1-8. doi:10.1103/PhysRevB.100.134432.


Cite as: http://hdl.handle.net/21.11116/0000-0005-19AF-B
Abstract
V-51 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 x(c) approximate to 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- and 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.