Electromagnetically induced grating in a crystal of molecular magnets system

•We provide a scheme to generate electromagnetically induced grating in a crystal of molecular magnets.•The transmission and absorption of the probe magnetic field can be changed by the standing field.•The efficiency of diffraction is depended on the intensity of coupling and the single photon detuning.

We investigate the response of the molecular system to the magnetic field modulation. Molecular magnets are subjected to a strong standing ac magnetic field and a weak probe magnetic field. The transmission and absorption of the weak probe magnetic field can be changed due to quantum coherence and the spatially modulating of the standing field. And a electromagnetically induced grating is formed in the crystal of molecular magnets via electromagnetically induced transparency (EIT). The diffraction efficiency of the grating can be adjusted efficiently by tuning the intensity of the standing wave field and the single photon detuning.