MgB2 Superconducting Whiskers Synthesized by Using the Hybrid Physical−Chemical Vapor Deposition

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• 作者：Yazhou Wang ; Chenggang Zhuang ; Jingyun Gao ; Xudong Shan ; Jingmin Zhang ; Zhimin Liao ; Hongjun Xu ; Dapeng Yu* ; Qingrong Feng*
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：February 25, 2009
• 年：2009
• 卷：131
• 期：7
• 页码：2436-2437
• 全文大小：186K
• 年卷期：v.131,no.7(February 25, 2009)
• ISSN：1520-5126

文摘

In this work, MgB₂ whiskers were fabricated on a copper substrate by using the hybrid physical−chemical vapor deposition, which was one of the most effective ways to make high quality pure MgB₂ films, with the possible growth mechanism discussed. The whiskers are hexagonal and conelike and grow along the [0001] direction with a single-crystal structure. The onset transition temperature is 39 K, which is among the best in the published nanostructure MgB₂ papers. Fabrication of nanoscale MgB₂ whiskers provides the fundamental understanding of the effect of dimensionality and size on superconductivity.