Preparation of Mo-Re-C samples containing Mo₇Re₁₃C with the β-Mn-type structure by solid state reaction of planetary-ball-milled powder mixtures of Mo, Re and C, and their crystal structures and superconductivity

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• 作者：Katsuyoshi Oh-ishi^a ; ^{oh-ishi@kc.chuo-u.ac.jp} ; Kenta Nagumo^a ; Kazuya Tateishi^a ; Ohnishi Takafumi^a ; Kenta Yoshikane^a ; Machiko Sugiyama^a ; Kengo Oka^a ; Ryota Kobayashi^b
• 关键词：A. Carbides ; B. Planetary ball milling ; C. Rietveld method ; D. Crystal structure ; D. Superconductivity
• 刊名：Journal of Solid State Chemistry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：245
• 期：Complete
• 页码：207-212
• 全文大小：1129 K
• 卷排序：245

文摘

Mo-Re-C compounds containing Mo7Re13C with the β-Mn structure were synthesized with high-melting-temperature metals Mo, Re, and C powders using a conventional solid state method with a planetary ball milling machine instead of the arc melting method. Use of the ball milling machine was necessary to obtain Mo7Re13C with the β-Mn structure using the solid state method. Almost single-phase Mo7Re13C with a trace of impurity were obtained using the synthesis method. By XRF and lattice parameter measurements on the samples, Fe element existed in the compound synthesized using the planetary ball milling machine with a pot and balls made of steel, though Fe element was not detected in the compound synthesized using a pot and balls made of tungsten carbide. The former compound containg the Fe atom did not show superconductivity but the latter compound without the Fe atom showed superconductivity at 6.1 K.