  Superconducting quantum interference device (SQUID) which is made of two
parallel Josephson junctions has applications in magnetometry. A similar
spin-based device is proposed here where spin superfluid in ferromagnet (FM)
mimics the superconducting state. Two materials CoFeB and Fe3Sn are used for
spin superfluid-based SQUID like device where easy plane anisotropy in CoFeB
can be engineered and Fe3Sn has inherent easy plane anisotropy. Frequency
varies in spin based proposed devices. Frequency increases and again decreases
with the increase in both applied magnetic field and applied spin current. The
proposed device can be used as nano oscillator and detector. The frequency in
the proposed device shows multiple frequency steps which can be used for
neuromorphic applications.
