  We investigate the performance of niobium nitride superconducting coplanar
waveguide resonators towards hybrid quantum devices with magnon-photon
coupling. We find internal quality factors ~ 20000 at 20 mK base temperature,
in zero magnetic field. We find that by reducing film thickness below 100 nm
internal quality factor greater than 1000 can be maintained up to parallel
magnetic field of ~ 1 T and perpendicular magnetic field of ~ 100 mT. We
further demonstrate strong coupling of microwave photons in these resonators,
with magnons in chromium trichloride, a van der Waals antiferromagnet, which
shows that these cavities serve as a good platform for studying magnon-photon
coupling in 2D magnonics based hybrid quantum systems. We demonstrate strong
magnon-photon coupling for both optical and acoustic magnon modes of an
antiferromagnet.
