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Surface Anisotropy of Permalloy in NM/NiFe/NM Multilayers



J O. Rantschler, P J. Chen, Anthony S. Arrott, Robert D. McMichael, William F. Egelhoff Jr., Brian B. Maranville


We have measured surface anisotropy in Permalloy (Py) deposited between two layers of normal metal (NM = Ag, Cu, or Ta) by determining the total perpendicular anisotropy using both the frequency and angular dependence of ferromagnetic resonance spectroscopy (FMR). The Py-Ta interface has a surface anisotropy of 0.078 b0.03 mJ/m2 and the Py-Ag and Py-Cu interfaces have surface anisotropies of 0.10 b0.04 mJ/m2. If the surface anisotropy is taken into account on the edges of a 200x100x4 nm3 oval Permalloy element, the switching field is reduced by 15%.
Journal of Applied Physics
No. 10


ferromagnetic resonance spectroscopy FMR, permalloy, perpendicular anisotropy, surface anisotropy


Rantschler, J. , Chen, P. , Arrott, A. , McMichael, R. , Egelhoff, W. and , B. (2005), Surface Anisotropy of Permalloy in NM/NiFe/NM Multilayers, Journal of Applied Physics (Accessed February 24, 2024)
Created May 1, 2005, Updated February 17, 2017