| 1 | Flux focusing with a superconducting nanoneedle for scanning SQUID susceptometry显示文摘A nanofabricated superconducting quantum interference device(nano-SQUID)is a direct and sensitive flux probe used for magnetic imaging of quantum materials and mesoscopic devices.Due to the functionalities of superconductive integrated circuits,nano-SQUIDs fabricated on chips are particularly versatile,but their spatial resolution has been limited by their planar geometries.Here,we use femtosecond laser 3-dimensional(3D)lithography to print a needle onto a nano-SQUID susceptometer to overcome the limits of the planar structure.The nanoneedle coated with a superconducting shell focused the flux from both the field coil and the sample.We performed scanning imaging with such a needle-on-SQUID(NoS)device on superconducting test patterns with topographic feedback.The NoS showed improved spatial resolution in both magnetometry and susceptometry relative to the planarized counterpart.This work serves as a proof-of-principle for integration and inductive coupling between superconducting 3D nanostructures and on-chip Josephson nanodevices. | B.K.Xiang S.Y.Wang Y.F.Wang J.J.Zhu H.T.Xu Y.H.Wang | 2023 | Microsystems & Nanoengineering2023，9，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员