title: Wide range tuning of resonant frequency for a vortex core in a regular triangle magnet.
abstract: A magnetic vortex structure stabilized in a micron or nano-sized ferromagnetic disk has a strong potential as a unit cell for spin-based nano-electronic devices because of negligible magnetostatic interaction and superior thermal stability. Moreover, various intriguing fundamental physics such as bloch point reversal and symmetry breaking can be induced in the dynamical behaviors in the magnetic vortex. The static and dynamic properties of the magnetic vortex can be tuned by the disk dimension and/or the separation distance between the disks. However, to realize these modifications, the preparations of other devices with different sample geometries are required. Here, we experimentally demonstrate that, in a regular-triangle Permalloy dot, the dynamic properties of a magnetic vortex are greatly modified by the application of the in-plane magnetic field. The obtained wide range tunability based on the asymmetric position dependence of the core potential provides attractive performances in the microwave spintronic devices.
authors.affiliation: 1] Advanced Electronics Research Division, INAMORI Frontier Research Center, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan [2] CREST, Japan Science and Technology Agency, Sanbancho, Tokyo 102-0075, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yakata
authors.affiliation: Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan.
authors.forename: Terumitsu
authors.initials: T
authors.lastname: Tanaka
authors.affiliation: 1] Advanced Electronics Research Division, INAMORI Frontier Research Center, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan [2] Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan.
authors.forename: Kohei
authors.initials: K
authors.lastname: Kiseki
authors.affiliation: Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan.
authors.forename: Kimihide
authors.initials: K
authors.lastname: Matsuyama
authors.affiliation: 1] Advanced Electronics Research Division, INAMORI Frontier Research Center, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan [2] CREST, Japan Science and Technology Agency, Sanbancho, Tokyo 102-0075, Japan [3] Department of Physics, Kyushu University, 6-10-1 Hakozaki, Fukuoka, 812-8581, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Kimura