Asymmetric energy potential of pinned domain walls at constrictions

Warnicke, Peter
October 2008
Applied Physics Letters;10/27/2008, Vol. 93 Issue 17, p172508
Academic Journal
The pinning properties of magnetic vortex domain walls were experimentally investigated in patterned nanowires with artificial constrictions. Domain walls were nucleated and depinned by applied magnetic fields and observed with magnetic force microscopy. It was found that the pinning strength is dependent on the chirality of the vortex wall. Micromagnetic simulations confirm these results and reveal the energy potential of the pinned domain wall, including the width of the pinning site.


Related Articles

  • Control of domain patterns in square shaped nickel rings. Zhu, Xiaobin; Grütter, P.; Metlushko, V.; Ilic, B. // Journal of Applied Physics;5/15/2003, Vol. 93 Issue 10, p7059 

    Magnetic rings in a square shape are studied by magnetic force microscopy with in situ in plane magnetic fields. Well defined domain structures are accessible by changing the orientation of the magnetic field. Magnetic domain wall can easily be trapped at corners. The domain patterns can be...

  • Field dependence of micromagnetic domain patterns in MnAs films. Engel-Herbert, R.; Hesjedal, T.; Mohanty, J.; Schaadt, D. M.; Ploog, K. H. // Journal of Applied Physics;9/15/2005, Vol. 98 Issue 6, p063909 

    We have studied the domain behavior of submicrometer wide ferromagnetic stripes by magnetic force microscopy (MFM) in the presence of an in situ magnetic field. MFM images in the demagnetized state show alternatingly magnetized domains fully extended across the stripe. Moreover, domain...

  • Magnetization reversal study in submicron half-ring patterned wires with different corner structures. Yu, C.; Chen, Y. S.; Yao, Y. D.; Cheng, K. W.; Lee, S. F.; Wu, K. T.; Liou, Y. // Journal of Applied Physics;4/15/2006, Vol. 99 Issue 8, p08G309 

    Magnetization reversal phenomena in submicron half-ring patterned wires with different corner structures have been investigated. The wires with corner structures of rectangular, semicircle, and triangular shapes were connected in series by two or five half-rings. The variation of domain...

  • Correlation of magnetic domains and magnetostrictive strains in Terfenol-D via magnetic force microscopy. Xie, S. H.; Liu, X. Y.; Zhou, Y. C.; Li, J. Y. // Journal of Applied Physics;Mar2011, Vol. 109 Issue 6, p063911 

    Local evolution of magnetic domain structures in Terfenol-D under variable magnetic fields is characterized using magnetic force microscopy and the resulting magnetostrictive strains parallel and perpendicular to the applied magnetic field are simultaneously measured. It is found that both...

  • Periodic magnetic domain wall pinning in an ultrathin film with perpendicular anisotropy generated by the stray magnetic field of a ferromagnetic nanodot array. Metaxas, P. J.; Zermatten, P.-J.; Jamet, J.-P.; Ferré, J.; Gaudin, G.; Rodmacq, B.; Schuhl, A.; Stamps, R. L. // Applied Physics Letters;3/30/2009, Vol. 94 Issue 13, p132504 

    The stray magnetic field of an array of hard ferromagnetic perpendicularly magnetized [Co/Pt]4 nanodots is used to nondestructively generate a periodic pinning potential for domain walls in an underlying [Pt/Co]2/Pt layer with perpendicular anisotropy. Pinning is evidenced using magneto-optical...

  • Chirality control and switching of vortices formed in hexagonal shaped ferromagnetic elements. Lua, S. Y. H.; Kushvaha, S. S.; Wu, Y. H.; Teo, K. L.; Chong, T. C. // Applied Physics Letters;9/22/2008, Vol. 93 Issue 12, p122504 

    We report on magnetic imaging study of hexagonal shaped ferromagnetic elements arranged in a ring network. Magnetic force microscopy images revealed the existence of vortex states in the hexagons, which agrees well with the micromagnetic modeling results. By making use of the stray field of...

  • Magnetic domain patterns in an asymmetric zigzag permalloy nanowire. Verma, L. K.; Ng, V. // Journal of Applied Physics;Mar2008, Vol. 103 Issue 5, p053902 

    Zigzag nanowires are potential candidates to study the shape dependence of nanoscale magnetic properties. Zigzag nanowires of modulated widths were studied at remanence by magnetic force microscopy, showing unique arrangements of magnetic domains. The alignment of magnetic moments changes with...

  • Magnetic domain characterizations of anisotropic-shaped MnAs nanoclusters position-controlled by selective-area metal-organic vapor phase epitaxy. Ito, Shingo; Hara, Shinjiroh; Wakatsuki, Toshitomo; Fukui, Takashi // Applied Physics Letters;6/15/2009, Vol. 94 Issue 24, p243117 

    The authors report the buildup fabrication and magnetic domain characterizations of anisotropic-shaped MnAs nanoclusters position-controlled on partially SiO2-masked GaAs (111)B substrates by selective-area metal-organic vapor phase epitaxy. Magnetic force microscopy reveals that both the...

  • Formation and structure of 360 and 540 degree domain walls in thin magnetic stripes. Jang, Youngman; Bowden, S. R.; Mascaro, Mark; Unguris, J.; Ross, C. A. // Applied Physics Letters;2/6/2012, Vol. 100 Issue 6, p062407 

    360°, 540°, and other complex transverse domain walls have been created in narrow cobalt wires connected to injection pads by cycling a magnetic field perpendicular to the wire length. The composite walls, formed by impingement of 180° transverse walls of alternating chirality, are...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics