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This paper investigates the relationship among interlayer exchange coupling(IEC), Dzyaloshinskii-Moriya interaction (DMI), and multilevel magnetizationswitching within a Co/Pt/Co heterostructure, where varying Pt thicknessesenable control over the coupling strength. Employing Brillouin Light Scatteringto quantify the effective DMI, we explore its potential role in magnetizationdynamics and multilevel magnetization switching. Experimental findings showfour distinct resistance states under an external magnetic field and spin Halleffect related spin current. We explain this phenomenon based on the asymmetrybetween Pt/Co and Co/Pt interfaces and the interlayer coupling, which, in turn,influences DMI and subsequently impacts the magnetization dynamics. Numericalsimulations, including macrospin, 1D domain wall, and simple spin wave models,further support the experimental observations of multilevel switching and helpuncover the underlying mechanisms. Our proposed explanation, supported bymagnetic domain observation using polar-magnetooptical Kerr microscopy, offersinsights into both the spatial distribution of magnetization and its dynamicsfor different IECs, thereby shedding light on its interplay with DMI, which maylead to potential applications in storage devices.

Influence of Ferromagnetic Interlayer Exchange Coupling on  Current-induced Magnetization Switching and Dzyaloshinskii-Moriya Interaction  in Co/Pt/Co Multilayer System