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Magnetic, Thermal, and Topographic Imaging with a Nanometer-Scale SQUID-On-Lever Scanning Probe

Wyss, M. and Bagani, K. and Jetter, D. and Marchiori, E. and Vervelaki, A. and Gross, B. and Ridderbos, J. and Gliga, S. and Schonenberger, C. and Poggio, M.. (2022) Magnetic, Thermal, and Topographic Imaging with a Nanometer-Scale SQUID-On-Lever Scanning Probe. Physical review applied, 17 (3). 034002.

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Official URL: https://edoc.unibas.ch/88150/

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Abstract

Scanning superconducting quantum interference device (SQUID) microscopy is a magnetic imaging technique combining high field sensitivity with nanometer-scale spatial resolution. Here, we demonstrate a scanning probe that combines the magnetic and thermal imaging provided by an on-tip SQUID with the tip-sample distance control and topographic contrast of a noncontact atomic force microscope (AFM). We pattern the nanometer-scale SQUID, including its weak-link Josephson junctions, via focused-ion beam milling at the apex of a cantilever coated with Nb, yielding a sensor with an effective diameter of 365 nm, field sensitivity of 9.5 nT/root Hz, and thermal sensitivity of 620 nK/root Hz, operating in magnetic fields up to 1.0 T. The resulting SQUID-on-lever probe is a robust AFM-like scanning probe that expands the reach of sensitive nanometer-scale magnetic and thermal imaging beyond what is currently possible.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanotechnologie Argovia (Poggio)
UniBasel Contributors:Wyss, Marcus and Jetter, Daniel Martin and Bagani, Kousik and Marchiori, Estéfani and Vervelaki, Andriani and Gross, Boris André and Ridderbos, Joost and Schönenberger, Christian and Poggio, Martino
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
ISSN:2331-7019
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:13 Apr 2022 10:00
Deposited On:13 Apr 2022 10:00

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