Advanced SQUID-on-lever scanning probe for high-sensitivity magnetic microscopy with sub-100-nm spatial resolution
Nanoscale superconducting quantum interference devices (SQUIDs) integrated on scanning probes are important for high-resolution magnetic imaging at low temperatures. Progress has been limited by a lack of robust sensors that can both be fabricated on the wafer scale and provide the highest spatial resolution. The authors combine optical lithography and focused-ion-beam milling to produce niobium nano-SQUIDs on silicon cantilevers, achieving high spatial resolution and sensitivity in magnetic fields of up to 0.5 T at 4.2 K. These sensors can image individual magnetic skyrmions and nanoscale magnetization patterns, significantly expanding the applicability of scanning SQUID microscopy.
Authors
- Oliver Kieler (ORCID: https://orcid.org/0000-0001-5193-8910)
- B. Gross (ORCID: https://orcid.org/0009-0002-0480-6549)
- Martino Poggio (ORCID: https://orcid.org/0000-0002-5327-051X)
- Daniel Jetter (ORCID: https://orcid.org/0000-0003-2207-2729)
- Andriani Vervelaki (ORCID: https://orcid.org/0009-0001-4900-1202)
- Arnaud Magrez (ORCID: https://orcid.org/0000-0001-5933-7036)
- Katharina Christina Kreß
- Priya R. Baral (ORCID: https://orcid.org/0000-0002-9755-6165)
- D. Koelle (ORCID: https://orcid.org/0000-0003-3948-2433)
- Armin W. Knoll (ORCID: https://orcid.org/0000-0003-2301-3149)
- R. Kleiner (ORCID: https://orcid.org/0000-0002-2819-9774)
- Ute Drechsler
- Jörg Ullmann (ORCID: https://orcid.org/0009-0009-4406-7358)
- Simon Koch (ORCID: https://orcid.org/0009-0005-4576-3479)
- T. Weber (ORCID: https://orcid.org/0009-0009-2634-7903)
- Simon F. Pfander (ORCID: https://orcid.org/0009-0005-9838-7673)
Institutions
- Physikalisch-Technische Bundesanstalt (DE)
- University of Basel (CH)
- Center for NanoScience (DE)
- IBM Research - Zurich (CH)
- Swiss Nanoscience Institute
- École Polytechnique Fédérale de Lausanne (CH)
- University of Tübingen (DE)
Publication Details
- Journal
- Physical Review Applied
- Published
- 2025-11-14
- DOI
- https://doi.org/10.1103/6s24-vz3k
- Citations
- 1
- Primary Topic
- Physics of Superconductivity and Magnetism
- Type
- article
- Field-Weighted Citation Impact
- 1.26