Vortex State Suppression in a Hexagonal Array of Interacting Py Triangular Rings

• Authors: F. Spizzo , L. Patrignani , D. Bisero , P. Vavassori , V. Metlushko
• Languages of publication: EN

Abstracts

EN

We investigate the effect of magnetostatic interactions on the magnetization reversal process of equilateral triangular rings arranged on a hexagonal lattice. Inter-ring interactions originate as rings corners host domain-walls that produce an intense dipolar field; the effect of such interactions is studied by recording hysteresis loops for different magnetic field orientations. Rings magnetic configuration is probed via magnetic force microscopy and diffraction magneto-optic Kerr effect measurements. We observe that the effect of stray fields due to domain-walls competes with that of shape anisotropy, and that the former prevails when the magnetic field orientation is parallel to rings symmetry axes.

Keywords

EN

75.60.Jk; 75.75.Fk; 75.30.Gw

Discipline

• 75.30.Gw: Magnetic anisotropy
• 75.60.Jk: Magnetization reversal mechanisms
• 75.75.Fk: Domain structures in nanoparticles

• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 123
• Issue: 2
• Pages: 218-220

Dates

published

2013-02

Contributors

author

F. Spizzo

• CNISM & Department of Physics and Earth Sciences, University of Ferrara, via G. Saragat 1, I-44122 Italy

author

L. Patrignani

• Imperial College of London, Blackett Laboratory, London SW7 2BW, UK

author

D. Bisero

• CNISM & Department of Physics and Earth Sciences, University of Ferrara, via G. Saragat 1, I-44122 Italy

author

P. Vavassori

• CNISM & Department of Physics and Earth Sciences, University of Ferrara, via G. Saragat 1, I-44122 Italy
• CIC nanoGUNE Consolider, Tolosa Hiribidea 76, E-20018 Donostia-San Sebastián, Spain

author

V. Metlushko

• Dept. of Electrical and Computer Eng., University of Illinois, Chicago, Illinois 60612, USA

References

• [1] P. Vavassori, O. Donzelli, M. Grimsditch, V. Metlushko, B. Ilic, Appl. Phys. Lett. 86, 032504 (2005)
• [2] T.J. Hayward, M.T. Bryan, P.W. Fry, P.M. Fundi, M.R.J. Gibbs, D.A. Allwood, M.-Y. Im, P. Fischer, J. Phys., Condens. Matter. 20, 313001 (2008)
• [3] P. Vavassori, D. Bisero, V. Bonanni, A. Busato, M. Grimsditch, K.M. Lebecki, V. Metlushko, B. Ilic, Phys. Rev. B 78, 174403 (2008)
• [4] M. Grimsditch, P. Vavassori, J. Phys., Condens. Matter 16, R275 (2004)
• [5] T. Verduci, C. Rufo, A. Berger, V. Metlushko, B. Ilic, P. Vavassori, Appl. Phys. Lett. 99, 095201 (2011)

Identifiers

DOI

10.12693/APhysPolA.123.218