Magnetic, Thermal, and Topographic Imaging with a Nanometer-Scale SQUID-On-Lever Scanning Probe
نویسندگان
چکیده
Scanning superconducting quantum interference device (SQUID) microscopy is a magnetic imaging technique combining high-field sensitivity with nanometer-scale spatial resolution. State-of-the-art SQUID-on-tip probes are now playing an important role in mapping correlation phenomena, such as superconductivity and magnetism, which have recently been observed two-dimensional van der Waals materials. Here, we demonstrate scanning probe that combines the thermal provided by on-tip SQUID tip-sample distance control topographic contrast of non-contact atomic force microscope (AFM). We pattern SQUID, including its weak-link Josephson junctions, via focused ion beam milling at apex cantilever coated Nb, yielding sensor effective diameter 365 nm, field 9.5 $\text{nT}/\sqrt{\text{Hz}}$ 620 $\text{nK}/\sqrt{\text{Hz}}$, operating fields up to 1.0 T. The resulting SQUID-on-lever robust AFM-like expands reach sensitive beyond what currently possible.
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ژورنال
عنوان ژورنال: Physical review applied
سال: 2022
ISSN: ['2331-7043', '2331-7019']
DOI: https://doi.org/10.1103/physrevapplied.17.034002