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Antiferromagnetic materials present us with rich and exciting physics, whichwe can exploit to open new avenues in spintronic device applications. Weexplore perpendicularly magnetized exchange biased systems of Pt/Co/IrMn andPt/Co/FeMn, where the crossover from paramagnetic to antiferromagnetic behaviorin the IrMn and FeMn layers is accessed by varying the thickness. Wedemonstrate, through magneto-optical imaging, that the magnetic domainmorphology of the ferromagnetic Co layer is influenced by the N${\'e}$el orderof the antiferromagnet (AFM) layers. We relate these variations to theanisotropy energy of the AFM layer and the ferromagnet-antiferromagnet (FM-AFM)inter-layer exchange coupling. We also quantify the interfacialDzyaloshinskii-Moriya interaction (DMI) in these systems by Brillouin lightscattering spectroscopy. The DMI remains unchanged, within experimentaluncertainty, for different phases of the AFM layers, which allows us toconclude that the DMI is largely insensitive to both AFM spin order andexchange bias. Understanding such fundamental mechanisms is crucial for thedevelopment of future devices employing chiral spin textures, such asN${\'e}$el domain walls and skyrmions, in FM-AFM heterostructures.

Magnetic domain texture and the Dzyaloshinskii-Moriya interaction in Pt/Co/IrMn and Pt/Co/FeMn thin films with perpendicular exchange bias