Freezing field dependance of the exchange bias in uniaxial FeF2-CoPt heterosystems with perpendicular anisotropy
نویسنده
چکیده
The exchange bias e!ect is measured for the "rst time in FeF 2 }CoPt heterosystems with perpendicular anisotropy. The exchange "eld exhibits a strong dependence on the axial freezing "eld. This behavior is explained in terms of the microscopic spin structure at the interface, which is established on cooling to below 1 N . We calculate the dependence of the spin structure on the freezing "eld within the framework of an Ising model. It takes into account the Zeeman energy as well as an antiferromagnetic exchange coupling between the adjacent layers at the interface. ( 2000 Elsevier Science B.V. All rights reserved. PACS: 75.10.Hk; 75.30.Gw; 75.50.Rr; 75.70.Cn
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تاریخ انتشار 2017