| Literature DB >> 22852696 |
A Finkler1, D Vasyukov, Y Segev, L Ne'eman, E O Lachman, M L Rappaport, Y Myasoedov, E Zeldov, M E Huber.
Abstract
We describe a new type of scanning probe microscope based on a superconducting quantum interference device (SQUID) that resides on the apex of a sharp tip. The SQUID-on-tip is glued to a quartz tuning fork which allows scanning at a tip-sample separation of a few nm. The magnetic flux sensitivity of the SQUID is 1.8 μΦ(0)/√Hz and the spatial resolution is about 200 nm, which can be further improved. This combination of high sensitivity, spatial resolution, bandwidth, and the very close proximity to the sample provides a powerful tool for study of dynamic magnetic phenomena on the nanoscale. The potential of the SQUID-on-tip microscope is demonstrated by imaging of the vortex lattice and of the local ac magnetic response in superconductors.Year: 2012 PMID： 22852696 DOI： 10.1063/1.4731656
Source DB: PubMed Journal: Rev Sci Instrum ISSN： 0034-6748 Impact factor: 1.523