Publication detail

Magnetic vortex nucleation modes in static magnetic fields

VAŇATKA, M. URBÁNEK, M. JÍRA, R. FLAJŠMAN, L. DHANKHAR, M. IM, M. MICHALIČKA, J. UHLÍŘ, V. ŠIKOLA, T.

Original Title

Magnetic vortex nucleation modes in static magnetic fields

Type

journal article in Web of Science

Language

English

Original Abstract

The magnetic vortex nucleation process in nanometer- and micrometer-sized magnetic disks undergoes several phases with distinct spin configurations called the nucleation states. Before formation of the final vortex state, small submicron disks typically proceed through the so-called C-state while the larger micron-sized disks proceed through the more complicated vortex-pair state or the buckling state. This work classifies the nucleation states using micromagnetic simulations and provides evidence for the stability of vortex-pair and buckling states in static magnetic fields using magnetic imaging techniques and electrical transport measurements. Lorentz Transmission Electron Microscopy and Magnetic Transmission X-ray Microscopy are employed to reveal the details of spin configuration in each of the nucleation states. We further show that it is possible to unambiguously identify these states by electrical measurements via the anisotropic magnetoresistance effect. Combination of the electrical transport and magnetic imaging techniques confirms stability of a vortex-antivortex-vortex spin configuration which emerges from the buckling state in static magnetic fields.

Keywords

Magnetic vortex; Nucleation; Lorentz TEM; Magnetic Transmission X-ray Microscopy

Authors

VAŇATKA, M.; URBÁNEK, M.; JÍRA, R.; FLAJŠMAN, L.; DHANKHAR, M.; IM, M.; MICHALIČKA, J.; UHLÍŘ, V.; ŠIKOLA, T.

Released

3. 10. 2017

ISBN

2158-3226

Periodical

AIP Advances

Year of study

7

Number

10

State

United States of America

Pages from

1

Pages to

8

Pages count

8

URL

https://aip.scitation.org/doi/10.1063/1.5006235

BibTex

@article{BUT140781,
  author="Marek {Vaňatka} and Michal {Urbánek} and Roman {Jíra} and Lukáš {Flajšman} and Meena {Dhankhar} and Mi-Young {Im} and Jan {Michalička} and Vojtěch {Uhlíř} and Tomáš {Šikola}",
  title="Magnetic vortex nucleation modes in static magnetic fields",
  journal="AIP Advances",
  year="2017",
  volume="7",
  number="10",
  pages="1--8",
  doi="10.1063/1.5006235",
  issn="2158-3226",
  url="https://aip.scitation.org/doi/10.1063/1.5006235"
}