采用物理化学气相沉积混合法合成的MgB2超导晶须。

MgB2 superconducting whiskers synthesized by using the hybrid physical-chemical vapor deposition.

作者信息

Wang Yazhou, Zhuang Chenggang, Gao Jingyun, Shan Xudong, Zhang Jingmin, Liao Zhimin, Xu Hongjun, Yu Dapeng, Feng Qingrong

机构信息

State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, PR China.

出版信息

J Am Chem Soc. 2009 Feb 25;131(7):2436-7. doi: 10.1021/ja8087828.

DOI:10.1021/ja8087828

PMID:19199641

Abstract

In this work, MgB(2) 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 MgB(2) 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 approximately 39 K, which is among the best in the published nanostructure MgB(2) papers. Fabrication of nanoscale MgB(2) whiskers provides the fundamental understanding of the effect of dimensionality and size on superconductivity.

摘要

在本工作中，采用物理化学气相沉积法在铜衬底上制备了MgB₂晶须，这是制备高质量纯MgB₂薄膜最有效的方法之一，并对其可能的生长机制进行了讨论。晶须为六方锥状，沿[0001]方向生长，具有单晶结构。起始转变温度约为39K，这在已发表的纳米结构MgB₂论文中是最好的之一。纳米级MgB₂晶须的制备为理解维度和尺寸对超导性的影响提供了基础。