Low-amplitude magnetic vortex core reversal by non-linear interaction between azimuthal spin waves and the vortex gyromode

Sproll, Markus; Noske, Matthias; Kammerer, Matthias; Dieterle, Georg; Weigand, Markus; Stoll, Hermann; Schütz, Gisela; Bauer, Hans; Gangwar, Ajay; Woltersdorf, Georg; Back, Christian H.

doi:10.1063/1.4861779

Title: Low-amplitude magnetic vortex core reversal by non-linear interaction between azimuthal spin waves and the vortex gyromode

Full Record
Other Related Research

Abstract

We show, by experiments and micromagnetic simulations in vortex structures, that an active “dual frequency” excitation of both the sub-GHz vortex gyromode and multi-GHz spin waves considerably changes the frequency response of spin wave mediated vortex core reversal. Besides additional minima in the switching threshold, a significant broadband reduction of the switching amplitudes is observed, which can be explained by non-linear interaction between the vortex gyromode and the spin waves. We conclude that the well known frequency spectra of azimuthal spin waves in vortex structures are altered substantially, when the vortex gyromode is actively excited simultaneously.

Authors:

Sproll, Markus; Noske, Matthias; Kammerer, Matthias; Dieterle, Georg; Weigand, Markus; Stoll, Hermann; Schütz, Gisela ^[1]; Bauer, Hans; Gangwar, Ajay; Woltersdorf, Georg; Back, Christian H. ^[2]

Max Planck Institute for Intelligent Systems (formerly MPI for Metals Research), Heisenbergstr. 3, 70569 Stuttgart (Germany)
Department of Physics, University of Regensburg, Universitätsstr. 31, 93040 Regensburg (Germany)

Publication Date:: Mon Jan 06 00:00:00 EST 2014

OSTI Identifier:: 22257122

Resource Type:: Journal Article

Journal Name:: Applied Physics Letters

Additional Journal Information:: Journal Volume: 104; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; INTERACTIONS; NONLINEAR PROBLEMS; SPIN WAVES; VORTICES

Citation Formats


                    Sproll, Markus, Noske, Matthias, Kammerer, Matthias, Dieterle, Georg, Weigand, Markus, Stoll, Hermann, Schütz, Gisela, Bauer, Hans, Gangwar, Ajay, Woltersdorf, Georg, and Back, Christian H. Low-amplitude magnetic vortex core reversal by non-linear interaction between azimuthal spin waves and the vortex gyromode.  United States: N. p., 2014. 
        Web.  doi:10.1063/1.4861779.

Copy to clipboard


                    Sproll, Markus, Noske, Matthias, Kammerer, Matthias, Dieterle, Georg, Weigand, Markus, Stoll, Hermann, Schütz, Gisela, Bauer, Hans, Gangwar, Ajay, Woltersdorf, Georg, & Back, Christian H. Low-amplitude magnetic vortex core reversal by non-linear interaction between azimuthal spin waves and the vortex gyromode.  United States.  https://doi.org/10.1063/1.4861779

Copy to clipboard


                    Sproll, Markus, Noske, Matthias, Kammerer, Matthias, Dieterle, Georg, Weigand, Markus, Stoll, Hermann, Schütz, Gisela, Bauer, Hans, Gangwar, Ajay, Woltersdorf, Georg, and Back, Christian H. 2014.  
        "Low-amplitude magnetic vortex core reversal by non-linear interaction between azimuthal spin waves and the vortex gyromode".  United States.  https://doi.org/10.1063/1.4861779.

Copy to clipboard


                    
@article{osti_22257122,

  title        = {Low-amplitude magnetic vortex core reversal by non-linear interaction between azimuthal spin waves and the vortex gyromode},

  author       = {Sproll, Markus and Noske, Matthias and Kammerer, Matthias and Dieterle, Georg and Weigand, Markus and Stoll, Hermann and Schütz, Gisela and Bauer, Hans and Gangwar, Ajay and Woltersdorf, Georg and Back, Christian H.},

  abstractNote = {We show, by experiments and micromagnetic simulations in vortex structures, that an active “dual frequency” excitation of both the sub-GHz vortex gyromode and multi-GHz spin waves considerably changes the frequency response of spin wave mediated vortex core reversal. Besides additional minima in the switching threshold, a significant broadband reduction of the switching amplitudes is observed, which can be explained by non-linear interaction between the vortex gyromode and the spin waves. We conclude that the well known frequency spectra of azimuthal spin waves in vortex structures are altered substantially, when the vortex gyromode is actively excited simultaneously.},

  doi          = {10.1063/1.4861779},

  url          = {https://www.osti.gov/biblio/22257122},
  journal      = {Applied Physics Letters},

  issn         = {0003-6951},

  number       = 1,

  volume       = 104,

  place        = {United States},

  year         = {Mon Jan 06 00:00:00 EST 2014},

  month        = {Mon Jan 06 00:00:00 EST 2014}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1063/1.4861779

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Azimuthal-spin-wave-mode-driven vortex-core reversals

Journal Article Yoo, Myoung-Woo; Kim, Sang-Koog - Journal of Applied Physics

We studied, by micromagnetic numerical calculations, asymmetric vortex-core reversals driven by the m = −1 and m = +1 azimuthal spin-wave modes' excitations in soft magnetic circular nano-disks. We addressed the similarities and differences between the asymmetric core reversals in terms of the temporal evolutions of the correlated core-motion speed, locally concentrated perpendicular gyrofield, and magnetization dip near the original vortex core. The criterion for the core reversals was found to be the magnetization dip that must reach the out-of-plane magnetization component, m{sub z} = −p, with the initial polarization p, where p = +1 (−1) for the upward (downward) core magnetization. The core-motion speed and the associatedmore »« less
https://doi.org/10.1063/1.4905689
Deep sub-nanosecond reversal of vortex cores confined in a spin-wave potential well

Journal Article Dong, Xinwei; Wang, Zhenyu; Wang, Ruifang - Applied Physics Letters

A spin-wave potential well is created in a permalloy nanodisk by setting up a cylindrical cavity in the center of the sample. We then apply a single-harmonic external magnetic field perpendicular to the disk plane to switch the vortex polarity of the sample. Our micromagnetic numerical studies establish that the effective spin-wave confinement by the potential well leads to much stronger magnetization oscillation in the sample. Therefore, the vortex core can be reversed well below 200 ps and over a wide range of field frequency. Our findings present an additional efficient means for ultrafast switching of magnetic vortices.
https://doi.org/10.1063/1.4868725
Non-linear radial spinwave modes in thin magnetic disks

Journal Article De Clercq, J.; Vansteenkiste, A.; Van Waeyenberge, B.; ... - Applied Physics Letters

We present an experimental investigation of radial spin-wave modes in magnetic nano-disks with a vortex ground state. The spin-wave amplitude was measured using a frequency-resolved magneto-optical spectrum analyzer, allowing for high-resolution resonance curves to be recorded. It was found that with increasing excitation amplitude up to about 10 mT, the lowest-order mode behaves strongly non-linearly as the mode frequency redshifts and the resonance peak strongly deforms. This behavior was quantitatively reproduced by micromagnetic simulations. Micromagnetic simulations showed that at higher excitation amplitudes, the spinwaves are transformed into a soliton by self-focusing, and collapse onto the vortex core, dispersing the energy inmore »« less
https://doi.org/10.1063/1.4906196
Temperature effect on vortex-core reversals in magnetic nanodots

Journal Article Kim, Bosung; Yoo, Myoung-Woo; Lee, Jehyun; ... - Journal of Applied Physics

We studied the temperature effect on vortex-core reversals in soft magnetic nanodots by micromagnetic numerical calculations within a framework of the stochastic Landau-Lifshitz-Gilbert scheme. It was determined that vortex-core-switching events at non-zero temperatures occur stochastically, and that the threshold field strength increases with temperature for a given field frequency. The mechanism of core reversals at elevated temperatures is the same as that of vortex-antivortex-pair-mediated core reversals found at the zero temperature. The reversal criterion is also the out-of-plane component of a magnetization dip that should reach −p, which is to say, m{sub z,dip} = −p, where p is the original polarization, p = +1more »« less
https://doi.org/10.1063/1.4919836
Spin Vortex Resonance in Non-planar Ferromagnetic Dots

Journal Article Ding, Junjia; Lapa, Pavel; Jain, Shikha; ... - Scientific Reports

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.
Cited by 6
https://doi.org/10.1038/srep25196

Full Text Available

Similar Records