Shape-independent permeability model for uniaxially-anisotropic ferromagnetic thin films

Jamieson, Brice; O'Donnell, Terence; Kulkarni, Santosh; Roy, Saibal
May 2010
Applied Physics Letters;5/17/2010, Vol. 96 Issue 20, p202509
Academic Journal
A permeability model based on the three-dimensional shape demagnetization effect is developed to estimate the permeability of any uniaxially-anisotropic ferromagnetic thin-film for integrated micromagnetic structures. The model is validated by comparison to measured ferromagnetic thin films (NiFe and CoPRe) with different anisotropies and saturation magnetizations. The dependence of permeability on film-thickness is modeled as a function of the demagnetization effect and verified against fabricated samples of varying thicknesses.


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