Development of Magnetization Measurement Devices Using Micro-dc-SQUIDs and a Sr2RuO4 Microplate
Development of Magnetization Measurement Devices Using Micro-dc-SQUIDs and a Sr2RuO4 Microplate
复制标题
使用 Micro-dc-SQUID 和 Sr2RuO4 微板开发磁化测量装置
DOI：
10.1007/s10909-016-1530-z
复制
发表时间：
2016
影响因子：
2
通讯作者：
Y. Maeno
中科院分区：
文献类型：
--
作者：
Y. Nago;T. Shinozaki;S. Tsuchiya;R. Ishiguro;H. Kashiwaya;S. Kashiwaya;S. Nomura;K. Kono;H. Takayanagi;Y. Maeno
我们开发了高灵敏度的磁化测量装置组成的微型直流SQUID和超导SrRuO微板，旨在研究新的磁性相关的自旋三重手征p波超导体的介观尺寸。采用薄Al电极制作了100 μ m尺寸的dc-SQUID，并对SQUID结构进行了改进，以防止磁通侵入SQUID电极。利用聚焦离子束将SrRuO超导微板制作成与SQUID环一样小的尺寸，并直接安装在SQUID上，精确定位，实现高灵敏度的磁化测量。在该装置的初步磁化测量中，我们观察到被捕获到板中的涡旋，从而观察到较低的临界场。改进的磁化测量装置，以排除不必要的磁通入侵成功地实现了高灵敏度检测的量化涡旋。
We developed high-sensitivity magnetization measurement devices composed of micro-dc-SQUIDs and a superconducting SrRuOmicroplate, aiming to investigate novel magnetic properties related to a spin-triplet chiral p-wave superconductor with a mesoscopic size. Micron-sized dc-SQUID was fabricated by thin Al electrodes, and the SQUID structure was improved to prevent magnetic fluxes from intruding into SQUID electrodes. A SrRuOsuperconducting microplate was fabricated into the size as small as the SQUID loop using a focused ion beam and directly mounted on the SQUID with precise positioning for high-sensitivity magnetization measurements. In the preliminary magnetization measurements of this device, we observed vortices trapped into the plate and thus the lower critical field. The improved magnetization measurement device developed to exclude undesirable flux intrusion successfully enabled high-sensitivity detection of quantized vortex.