title: Dynamical pinning of a domain wall in a magnetic nanowire induced by Walker breakdown.
abstract: Transmission probability of a domain wall through a magnetic nanowire is investigated as a function of the external magnetic field. A very intriguing phenomenon is found that the transmission probability shows a significant drop after exceeding the threshold driving field, which contradicts our intuition that a domain wall is more mobile in the higher magnetic field. The micromagnetics simulation reveals that the domain wall motion in the wire with finite roughness causes the dynamical pinning due to the Walker breakdown, which semiquantitatively explains our experimental results.
authors.affiliation: Institute for Chemical Research, Kyoto University, Uji, 611-0011, Kyoto, Japan.
authors.forename: Hironobu
authors.initials: H
authors.lastname: Tanigawa
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Koyama
authors.forename: Maciej
authors.initials: M
authors.lastname: Bartkowiak
authors.forename: Shinya
authors.initials: S
authors.lastname: Kasai
authors.forename: Kensuke
authors.initials: K
authors.lastname: Kobayashi
authors.forename: Teruo
authors.initials: T
authors.lastname: Ono
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Nakatani