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Effect of Capping Material on Interfacial Ferromagnetism in FeRh Thin Films



C. Baldasseroni, G. K. Palsson, C. Bordel, S. Valencia, A. A. Unal, F. Kronast, S. Nemsak, C. S. Fadley, Julie Borchers, Brian B. Maranville, F. Hellman


The role of the capping material in stabilizing a thin ferromagnetic layer at the interface between an FeRh film and cap in the nominally antiferromagnetic phase at room temperature was studied by x-ray magnetic circular dichroism in photoemission electron microscopy and polarized neutron reflectivity. These techniques were used to determine the presence or absence of interfacial ferromagnetism (FM) in films capped with oxides and metals. Chemically stable oxide caps do not generate any interfacial FM while the effect of metallic caps depends on the element, showing that interfacial FM is due to metallic interdiffusion and the formation of a ternary alloy with a modified antiferromagnetic to ferromagnetic transition temperature.
Physical Review B


Antiferromagnetic transition, Neutron Reflectivity, Interfacial ferromagnetism, Magnetic thin film, PEEM, FeRh


Baldasseroni, C. , Palsson, G. , Bordel, C. , Valencia, S. , Unal, A. , Kronast, F. , Nemsak, S. , Fadley, C. , Borchers, J. , Maranville, B. and Hellman, F. (2014), Effect of Capping Material on Interfacial Ferromagnetism in FeRh Thin Films, Physical Review B, [online], (Accessed April 22, 2024)
Created January 30, 2014, Updated October 12, 2021