title: Spin Vortex Resonance in Non-planar Ferromagnetic Dots.
abstract: In planar structures, the vortex resonance frequency changes little as a function of an in-plane magnetic field as long as the vortex state persists. Altering the topography of the element leads to a vastly different dynamic response that arises due to the local vortex core confinement effect. In this work, we studied the magnetic excitations in non-planar ferromagnetic dots using a broadband microwave spectroscopy technique. Two distinct regimes of vortex gyration were detected depending on the vortex core position. The experimental results are in qualitative agreement with micromagnetic simulations.
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors.forename: Junjia
authors.initials: J
authors.lastname: Ding
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.|Texas A&M University, College Station, TX 77843, USA.
authors.forename: Pavel
authors.initials: P
authors.lastname: Lapa
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors.forename: Shikha
authors.initials: S
authors.lastname: Jain
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors.forename: Trupti
authors.initials: T
authors.lastname: Khaire
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors.forename: Sergi
authors.initials: S
authors.lastname: Lendinez
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors.forename: Matthias B
authors.initials: MB
authors.lastname: Jungfleisch
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors.forename: Christian M
authors.initials: CM
authors.lastname: Posada
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors.forename: Volodymyr G
authors.initials: VG
authors.lastname: Yefremenko
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors.forename: John E
authors.initials: JE
authors.lastname: Pearson
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors.forename: Axel
authors.initials: A
authors.lastname: Hoffmann
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors.forename: Valentine
authors.initials: V
authors.lastname: Novosad