title: Coercivity of permanent magnetic thin film.
abstract: The coercivity of magnetic thin film having a two-dimensional easy-axis distribution is investigated within the framework of a simple micromagnetic model. It is found that the coercivity decreases from 0.14H(K) to a minimum of 0.07H(K) as thickness increases, where H(K) is the anisotropy field. It is substantially lower than that given by the Stoner-Wohlfarth model and is consistent with available experimental data. The calculated hysteresis loop and the initial magnetization curve are also in good agreement with experiments.
authors.affiliation: Institute of Solid State Physics, Sichuan Normal University, Chengdu, 610066, People's Republic of China.
authors.forename: G P
authors.initials: GP
authors.lastname: Zhao
authors.forename: M G
authors.initials: MG
authors.lastname: Zhao
authors.forename: H S
authors.initials: HS
authors.lastname: Lim
authors.forename: Y P
authors.initials: YP
authors.lastname: Feng
authors.forename: C K
authors.initials: CK
authors.lastname: Ong