Topology optimization of perpendicular magnetic recording system by considering magnetic nonlinearity

Soonok Park, Jeonghoon Yoo, Seungjae Min

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This paper proposes a density method based topology optimization of a perpendicular magnetic recording system design in which the saturation effect is taken into account. During the topology optimization process in magnetic fields, the magnetic reluctivity is updated in accordance with the changes in element density determined, by a sensitivity analysis. The magnetic reluctivity is determined from a B-H curve and is used to represent nonlinear material property, i.e., the saturation effect. The sensitivity for a generalized response functional is formulated using the adjoínť variable method in which the nonlinear property is taken into account and the objective function is set such that the magnetic energy in the media is maximized. Effects due to the nonlinear property can be observed from a numerical study in which the linear and the nonlinear topology optimization results are compared.

Original languageEnglish
Pages (from-to)821-827
Number of pages7
JournalTransactions of the Korean Society of Mechanical Engineers, A
Issue number7
Publication statusPublished - 2010 Jul

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering


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