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Single crystal growth of CeNi~2~Ge~2~ using the floating zone technique by C. Bergmann; H. S. Jeevan; M. Schubert; C. Geibel; P. Gegenwart is a Physics and Astronomy article available to read on EtoBox.

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## Abstract In order to investigate the low‐temperature electronic properties of the heavy‐fermion metal CeNi~2~Ge~2~, single crystals were grown using the floating zone technique. Previous investigations on polycrystals of CeNi~2~Ge~2~ have revealed that the low‐temperature properties, i.e., non‐Fermi liquid (NFL) behavior and incipient superconductivity, are strongly sample dependent, possibly due to a slight variation of the Ni and Ge content. We prepared polycrystalline feed rods of slightly off‐stoichiometric composition by induction or arc‐melting methods and grew single crystals using a four‐mirror optical furnace under high‐purity argon atmosphere. As a result, large single crystals of few centimeter size have been obtained. Annealed pieces were investigated by measurements of the temperature dependence of the electrical resistivity __ρ__(__T__). A clear correlation between the starting composition and the obtained resistivity ratio (RR~2K~) was found with the highest ratio for a nominal starting composition of Ce~0.98~Ni~2.025~Ge~1.975~ (${\rm RR}\_{2{\rm K}} = 29$). The temperature dependence of the electrical resistivity is similar as reported previously and displays NFL

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Author

C. Bergmann; H. S. Jeevan; M. Schubert; C. Geibel; P. Gegenwart

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 0370-1972)

Published

2010

Language

EN

Field

Physics and Astronomy (Physical Sciences)