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Calculation of eddy-current loss in multilayer magnetic films considering displacement current

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2 Author(s)
Di Yao ; Thayer School of Engineering at Dartmouth, 8000 Cummings Hall, Hanover, New Hampshire 03755, USA ; Sullivan, C.R.

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At high frequency, displacement current in dielectric layers of multilayer magnetic thin films becomes significant, and eddy-current loss can be much worse than would be predicted without considering displacement current. Two-dimensional finite-element method simulations were used to study the behavior of eddy-current loss in multilayer thin films from 1 kHz to 1 GHz. A closed-form expression for accurate loss prediction with error less than 10% was developed, and its consistency with experimental measurements on Co–Zr–O/ZrO2 multilayer films was checked.

Published in:

Journal of Applied Physics  (Volume:105 ,  Issue: 7 )