TY - JOUR
T1 - Coercivity enhancement in exchange biased systems driven by interfacial magnetic frustration
AU - Leighton, C.
AU - Nogués, J.
AU - Jönsson-Åkerman, B. J.
AU - Schuller, Ivan K.
PY - 2000
Y1 - 2000
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.84.3466
DO - 10.1103/PhysRevLett.84.3466
M3 - Article
AN - SCOPUS:0000259827
SN - 0031-9007
VL - 84
SP - 3466
EP - 3469
JO - Physical review letters
JF - Physical review letters
IS - 15
ER -