ADMX SLIC: Results from a Superconducting LC Circuit Investigating Cold
  Axions
  Axions are a promising cold dark matter candidate. Haloscopes, which use the
conversion of axions to photons in the presence of a magnetic field to detect
axions, are the basis of microwave cavity searches such as the Axion Dark
Matter eXperiment (ADMX). To search for lighter, low frequency axions in the
sub $2\times10^{-7}$ eV (50 MHz) range, a tunable lumped-element LC circuit has
been proposed. For the first time, through ADMX SLIC (Superconducting Lc
circuit Investigating Cold axions), a resonant LC circuit was used to probe
this region of axion mass-coupling space. The detector used a superconducting
LC circuit with piezoelectric driven capacitive tuning. The axion mass and
corresponding frequency range $1.7498 -1.7519 \times10^{-7}$ eV (42.31 -- 42.36
MHz), $1.7734 - 1.7738 \times10^{-7}$ eV (42.88 -- 42.89 MHz), and $1.8007 -
1.8015 \times10^{-7}$ eV (43.54 -- 43.56 MHz) was covered at magnetic fields of
4.5 T, 5.0 T, and 7.0 T respectively. Exclusion results from the search data,
for coupling below $10^{-12} \text{GeV}^{-1}$ are presented.
