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Journal Articles

A Cu NQR study in a $$d$$-electron heavy-fermion system, CaCu$$_{3}$$Ru$$_{4}$$O$$_{12}$$

Kato, Harukazu*; Tsuruta, Takuya*; Nishioka, Takashi*; Matsumura, Masahiro*; Sakai, Hironori; Kambe, Shinsaku

Journal of Physics and Chemistry of Solids, 68(11), p.2187 - 2190, 2007/11

 Times Cited Count:8 Percentile:38.73(Chemistry, Multidisciplinary)

Cu nuclear quadrupole resonance (NQR) studies have been carried out for CaCu$$_{3}$$Ru$$_{4}$$O$$_{12}$$,which has been suggested to show a heavy-fermion-like behavioral though it possess no f electron. A Lorentzian shape of the Cu NQR line with a narrow width implies that no magnetic ordering appears, at least, down to 5 K. The spin-lattice relaxation rate of the Cu nuclei probes a change of the Cu 3$$d$$ electron nature, resulting in the Fermi liquid state at a low temperature. These facts strongly support that the heavy fermion picture is available in the concerned compound.

Journal Articles

Cu NMR study in a heavy-electron system, CaCu$$_3$$Ru$$_4$$O$$_{12}$$

Kato, Harukazu*; Tsuruta, Takuya*; Nishioka, Takashi*; Matsumura, Masahiro*; Sakai, Hironori; Kambe, Shinsaku

Journal of Magnetism and Magnetic Materials, 310(2, Part1), p.251 - 253, 2007/03

Cu NMR measurements have been carried out for CaCu$$_3$$Ru$$_4$$O$$_{12}$$, which shows a heavy-fermion-like behavior although it posseses no f electron moment. The field-sweep spectrum observed can be understood as a powder pattern of a Cu nucleus affected by the quadrupole interaction with no axial symmetry. The quadrupole parameters and the Knight shift of Cu are evaluated.

Oral presentation

Water flux model around TRIES/MIU to explain the gravity change, 2

Honda, Ryo*; Yanagizawa, Koichi; Okubo, Makoto*; Tanaka, Toshiyuki*

no journal, , 

no abstracts in English

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