物理学报Issue(23)：1-8,8.DOI:10.7498/aps.63.237401
混合物理化学气相沉积法制备MgB2单晶纳米晶片的研究∗
Study on single crystal MgB2 nanosheets grown by hybrid physical-chemical vap or dep osition
摘要
Abstract
This report is focused on the MgB2 nanosheets which have a hexagonal single crystal structure with variable thickness and different radial dimensions. The nanosheets are fabricated by hybird physical-chemical vapor deposition for the first time, as far as we know, and meanwhile they can be site-specific transferred so as to make physical properties measurement. Results of electrical and magnetic measurements indicate that the nanosheets is superconductive with a Tconset =38 K, Tc(0)=33 K. The images of scanning electrical microscope show that the nanosheets have a nanoscale thickness and have not only a large scale in wildth from several microns to hundreds of microns but also a flat cleaning surface. The selected area electrical diffraction data is consistent with the early report of MgB2 diffraction. According to those results, the single crystal nanosheets with high quality can be surely indentified as MgB2. It suggests a new technique for MgB2 single crystal fabrication, and a zero electrical behavior is observed in nanoscale single crystal MgB2. This could be a new opportunity to make a right material for the afterward research such as flux vortices, nanoscale mechanical properties.关键词
单晶MgB2/超导纳米晶片/零电阻/混合物理化学气相沉积法Key words
single crystal MgB2/superconducting nanosheets/zero electrical behavior/hybrid physical-chemical vapor deposition引用本文复制引用
张焱,王越,马平,冯庆荣..混合物理化学气相沉积法制备MgB2单晶纳米晶片的研究∗[J].物理学报,2014,(23):1-8,8.基金项目
国家重点基础研究发展计划(批准号:2006CD601004,2011CB605904,2011CBA00104)、国家自然科学基金(批准号:51177160,11074008)和国家自然科学基金国家基础科学人才培养基金(批准号：J0630311)资助的课题.* Project supported by the National Basic Research Program of China (Grant Nos.2006CD601004,2011CB605904,2011C-BA00104), the National Natural Science Foundation of China (Grant Nos.51177160,11074008), and the Fund for Fostering Talents in Basic Science of the National Natural Science Foundation of China (Grant No. J0630311) （批准号:2006CD601004,2011CB605904,2011CBA00104）
