Vortex Dynamics in Ferromagnetic Nanoelements Observed by Micro-Hall Probes

• Authors: T. Ščepka , J. Šoltýs , M. Precner , J. Fedor , J. Tóbik , D. Gregušová , F. Gucmann , R. Kúdela , V. Cambel
• Languages of publication: EN

Abstracts

EN

In this work we measure the nucleation and annihilation of magnetic vortices in Pacman-like (PL) micromagnets prepared from Permalloy (Ni_{81}Fe_{19}, Py) at 77 K. Lateral dimensions of explored objects are ≤1 μm with thickness of about 40 nm. The micromagnets are located directly on the high-sensitive micro-Hall probe based on GaAs/AlGaAs heterostructure by lift-off process. Experiments show good agreement of the magnetization reversal with the micromagnetic simulation. Other shapes of micromagnets are also considered to obtain more precise picture of the vortex dynamics.

Keywords

EN

81.16.Nd; 75.60.Jk; 74.25.Ha

Discipline

• 74.25.Ha: Magnetic properties including vortex structures and related phenomena(for vortices, magnetic bubbles, and magnetic domain structure, see 75.70.Kw)
• 75.60.Jk: Magnetization reversal mechanisms
• 81.16.Nd: Micro- and nanolithography

• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 1
• Pages: 390-391

Dates

published

2014-07

Contributors

author

T. Ščepka

• Institute of Electrical Engineering, Slovak Academy of Sciences, 841 04 Bratislava, Slovakia

author

J. Šoltýs

• Institute of Electrical Engineering, Slovak Academy of Sciences, 841 04 Bratislava, Slovakia

author

M. Precner

• Institute of Electrical Engineering, Slovak Academy of Sciences, 841 04 Bratislava, Slovakia

author

J. Fedor

• Institute of Electrical Engineering, Slovak Academy of Sciences, 841 04 Bratislava, Slovakia

author

J. Tóbik

• Institute of Electrical Engineering, Slovak Academy of Sciences, 841 04 Bratislava, Slovakia

author

D. Gregušová

• Institute of Electrical Engineering, Slovak Academy of Sciences, 841 04 Bratislava, Slovakia

author

F. Gucmann

• Institute of Electrical Engineering, Slovak Academy of Sciences, 841 04 Bratislava, Slovakia

author

R. Kúdela

• Institute of Electrical Engineering, Slovak Academy of Sciences, 841 04 Bratislava, Slovakia

author

V. Cambel

• Institute of Electrical Engineering, Slovak Academy of Sciences, 841 04 Bratislava, Slovakia

References

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Identifiers

DOI

10.12693/APhysPolA.126.390