Magnetic domain compensation effect on the magnetodynamic response of ferromagnetic elements

Patschureck, C.; Kaltofen, R.; M&a#x00F6;nch, I.; Schäfer, R.; Schultz, L.; McCord, J.
August 2010
Applied Physics Letters;8/2/2010, Vol. 97 Issue 5, p052507
Academic Journal
The capacity to tune the ferromagnetic resonance frequency in a soft ferromagnetic film relies on the ability to tailor the uniaxial anisotropy of the film material. We achieved a systematic change in anisotropy field with all other material properties remaining constant by preparing Ni18Fe19/Co60Fe20B20 multilayers. We show that in patterned films deviations from the regular Landau domain pattern occur, which compensate magnetic anisotropy effects and thereby lead to a precessional frequency independent of anisotropy. These results demonstrate that even small changes in the magnetic domain structure counteracts anisotropy adjustments in optimizing the magnetodynamic response in mesoscopic thin film elements.


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