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oai:recercat.cat:2072/4012262024-11-30T23:10:17Zcom_2072_98col_2072_378192

00925njm 22002777a 4500 dc Leighton, C. author Nogués, Josep author Jönsson-Akerman, B. J. author Schuller, Ivan K. author American Physical Society author 2000 We report the temperature and cooling field dependence of the coercivity of exchange biased MnF2/Fe bilayers. When the antiferromagnetic surface is in a state of maximum magnetic frustration and the net exchange bias is zero, we observe a strong enhancement of the coercivity, which is proportional to the exchange coupling between the layers. Hence, the coercivity can be tuned in a reproducible and repeatable fashion in the same sample. We propose that a frustrated interface provides local energy minima which effectively pin the propagating domain walls in the ferromagnet, leading to an enhanced coercivity. Coercivity enhancement in exchange biased systems driven by interfacial magnetic frustration