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http://dx.doi.org/10.4283/JKMS.2017.27.3.077

Rotatable Anisotropy Field in Exchange Coupled CoFe/MnIr(2.5 nm) Thin Films  

Yoon, Seok Soo (Department of Physics, Andong National University)
Kim, Dong Young (Department of Physics, Andong National University)
Publication Information
Journal of the Korean Magnetics Society / v.27, no.3, 2017 , pp. 77-81 More about this Journal
Abstract
The rotatable anisotropy effect was observed in the ferromagnetic resonance measurement in exchange coupled ferromagnetic/antiferromagnetic thin films and it was due to rotation of antiferromagnetic layer by the exchange coupling energy. We analyzed the CoFe thickness dependence of rotatable anisotropy field and ferromagnetic resonance linewidth in exchange coupled $CoFe(t_F)/MnIr(2.5nm)$ thin films. The rotatable anisotropy field was inversely propositional to the CoFe thickness and it was well fitted by the rotatable anisotropy energy of $0.96erg/cm^2$. The ferromagnetic resonance linewidth were linearly propositional to the rotatable anisotropy field in $t_F$ < 50 nm, while it was more dominated by the eddy current effect in $t_F$ > 50 nm.
Keywords
rotatable anisotropy; linewidth; exchange coupling; critical thickness; eddy current;
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