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Kudo, M. Nohara, M. Takasuga, Y. Okamoto, Z. Hiroi","submitted_at":"2012-04-23T01:34:22Z","abstract_excerpt":"The effects of phosphorus doping on the structural and superconducting phase transitions of BaNi$_2$(As$_{1-x}$P$_x$)$_2$ were studied. The specific heat, resistivity, and magnetic susceptibility were measured. The results revealed an abrupt increase in the superconducting transition temperature ($T_c$) from 0.6 K in the triclinic phase (space group P$\\bar{1}$) with less phosphorus (0 $\\leq$ $x$ $\\leq$ 0.067) to 3.3 K in the tetragonal phase (space group I4/mmm) with more phosphorus ($x$ $\\geq$ 0.067). 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