Cu衬底MgB_2超导晶须的制备及性质  

The Fabrication and Property of MgB_2 Whiskers on Copper Substrate

作　　者：王亚洲[1] 庄承钢[1] 冯庆荣[1] 

机构地区：[1]北京大学人工微结构与介观物理国家重点实验室,北京100871

出　　处：《稀有金属材料与工程》2008年第A04期146-149,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50572001);国家"973"计划项目(2006CB601007)资助

摘　　要：通过混合物理化学气相沉积法,在Cu衬底上制备出长有MgB2超导晶须的厚膜。MgB2晶须顶端直径在1μm左右,根部直径约200nm,长约4μm,整体呈现出六角锥状。通过实验条件的分析,知道衬底表面上方MgB2饱和度不一致,中间较周边低,可能导致了MgB2晶须生长在衬底周边区域。We have fabricated MgB2 thick film with whiskers existed in the corner on a copper substrate by hybrid physical-chemical vapor deposition （HPCVD） method. The whisker is cone-like and the top diameter is around 1 μm while the bottom is about 200 nm. We analyzed the deposition process, and found that the saturation of MgB2 was not uniform, which on the center of the sample was lower than that on the side. This un-uniformity may trigger the growth of the MgB2 whisker in side of the substrate.

关 键 词：MgB2晶须 Cu衬底 混合物理化学气相沉积 

分 类 号：TM26[一般工业技术—材料科学与工程]