@article{32ee0ef352084f05987b2cc7c7855cd4,
title = "Vortex dynamics in coupled ferromagnetic multilayer structures",
abstract = "Magnetization dynamics in ferromagnetic multilayer structures was studied by time-resolved transmission x-ray microscopy. A square-shaped 1×1 μ m2 trilayer structure consisting of Co (20 nm) Cu (10 nm) Permalloy Ni80 Fe20 (20 nm) was investigated. Each ferromagnetic layer showed a Landau-like domain configuration with a single vortex. A gyrotropic vortex motion was excited by an in-plane magnetic field alternating at a frequency of 250 MHz. The movement of the magnetic vortex in each individual magnetic layer was imaged by taking advantage of the element specificity of the x-ray magnetic circular dichroism. A 180° phase shift between the gyrotropic vortex motion in the Permalloy and the Co layer was observed. This phase shift can be ascribed to the magnetic coupling between the layers.",
author = "Chou, {Kang Wei} and Aleksandar Puzic and Hermann Stoll and Gisela Sch{\"u}tz and {Van Waeyenberge}, Bartel and Tolek Tyliszczak and Karsten Rott and G{\"u}nter Reiss and Hubert Br{\"u}ckl and Ingo Neudecker and Dieter Weiss and Back, {Christian H.}",
note = "Funding Information: The authors would like to thank Thomas Eim{\"u}ller and Yves Acremann for many fruitful discussions as well as all people at the Advanced Light Source, the Bielefeld University and the Regensburg University who were involved in these measurements and in the preparation of the samples. Financial support by the DFG (priority program “Ultrafast Magnetization Processes”) and the Flemish government (Attraction Pole IAP 5/01) is gratefully acknowledged. The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.",
year = "2006",
doi = "10.1063/1.2173630",
language = "English",
volume = "99",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics",
number = "8",
}