title: Effect of a pinning field on the critical current density for current-induced domain wall motion in perpendicular magnetic anisotropy nanowires.
abstract: In this study, the effect of a pinning field on the critical current density for current-induced domain wall motion in nanowires with perpendicular magnetic anisotropy was investigated using micromagnetic simulations. In order to estimate the pinning field in notched nanowires, we conducted wall energy calculations for nanowires with various saturation magnetizations. The pinning field increased as the notch size increased. The pinning field decreased as the saturation magnetization decreased. As a result, the decreased in the pinning field causes the reduction of the critical current density. Therefore, a significant reduction of the critical current density can be obtained by decreasing the saturation magnetization, even if wall pinning occurs.
authors.affiliation: Department of Media and Telecommunications Engineering, Ibaraki University, 4-12-1 Nakanarusawa-Cho, Hitachi, Ibaraki 316-8511, Japan.
authors.forename: Ayaka
authors.initials: A
authors.lastname: Ooba
authors.forename: Yuma
authors.initials: Y
authors.lastname: Fujimura
authors.forename: Kota
authors.initials: K
authors.lastname: Takahashi
authors.forename: Takashi
authors.initials: T
authors.lastname: Komine
authors.forename: Ryuji
authors.initials: R
authors.lastname: Sugita