  The hybrid microwave optomechanical-magnetic system has recently emerged as a
promising candidate for coherent information processing because of the
ultrastrong microwave photon-magnon coupling and the longlife of the magnon and
phonon. As a quantum information processing device, the realization of a single
excitation holds special meaning for the hybrid system. In this paper, we
introduce a single two-level atom into the optomechanical-magnetic system and
show that an unconventional blockade due to destructive interference cannot
offer a blockade of both the photon and magnon. Meanwhile, under the condition
of single excitation resonance, the blockade of the photon, phonon, and magnon
can be achieved simultaneously even in a weak optomechanical region, but the
phonon blockade still requires the cryogenic temperature condition.
