Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic, thermal, and topographic imaging with a nanometer-scale
  SQUID-on-cantilever scanning probe   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 in
two-dimensional van der Waals materials. 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 non-contact
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 $\text{nT}/\sqrt{\text{Hz}}$ and thermal
sensitivity of 620 $\text{nK}/\sqrt{\text{Hz}}$, operating in magnetic fields
up to 1.0 T. The resulting SQUID-on-lever is a robust AFM-like scanning probe
that expands the reach of sensitive nanometer-scale magnetic and thermal
imaging beyond what is currently possible.

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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: stat