Shape dependent magnetization reversal processes of microstructured epitaxial Fe(110) elements

C. König, M. Sperlich, R. Calarco, J. O. Hauch, U. Rüdiger, G. Güntherodt, S. Kirsch, B. Özyilmaz, A. D. Kent

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The magnetization reversal processes and magnetic domain states of microstructured epitaxial Fe[110] elements have been investigated by magnetic force microscopy and longitudinal Kerr hysteresis loop measurements. For this purpose 25 nm thick epitaxial Fe[110] films were grown on (11-20) oriented Al2O3 substrates using molecular beam epitaxy techniques in ultra high vacuum. These films have been patterned into arrays of well defined magnetic elements with lateral dimensions of 1.5 μmx0.5 μm by electron beam lithography followed by argon ion milling. Two different particle shapes have been realized: rectangular and diamond- shaped elements. By aligning the long axis of the particles parallel to the easy magnetic axis of the Fe[110] films, i.e. the in-plane Fe[001] direction, the interplay of shape, magnetocrystalline, as well as the strain-induced uniaxial anisotropy favors a single domain state. It has been shown that the characteristic micromagnetic behavior such as coercive and nucleation fields can be tailored by taking advantage of the pronounced uniaxial anisotropy and by varying the shape of the elements. Independent of the shape of the elements the remanent state after magnetic saturation along the long axis of the elements is a single domain state. In contrast, after magnetic saturation perpendicular to the long axis various multi-domain states have been observed. The determined flux closure domain states are in good agreement with micromagnetic simulations.

    Original languageEnglish (US)
    Title of host publicationINTERMAG Europe 2002 - IEEE International Magnetics Conference
    EditorsJ. Fidler, B. Hillebrands, C. Ross, D. Weller, L. Folks, E. Hill, M. Vazquez Villalabeitia, J. A. Bain, Jo De Boeck, R. Wood
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)0780373650, 9780780373655
    DOIs
    StatePublished - 2002
    Event2002 IEEE International Magnetics Conference, INTERMAG Europe 2002 - Amsterdam, Netherlands
    Duration: Apr 28 2002May 2 2002

    Publication series

    NameINTERMAG Europe 2002 - IEEE International Magnetics Conference

    Other

    Other2002 IEEE International Magnetics Conference, INTERMAG Europe 2002
    CountryNetherlands
    CityAmsterdam
    Period4/28/025/2/02

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Electrical and Electronic Engineering
    • Surfaces, Coatings and Films

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  • Cite this

    König, C., Sperlich, M., Calarco, R., Hauch, J. O., Rüdiger, U., Güntherodt, G., Kirsch, S., Özyilmaz, B., & Kent, A. D. (2002). Shape dependent magnetization reversal processes of microstructured epitaxial Fe(110) elements. In J. Fidler, B. Hillebrands, C. Ross, D. Weller, L. Folks, E. Hill, M. Vazquez Villalabeitia, J. A. Bain, J. De Boeck, & R. Wood (Eds.), INTERMAG Europe 2002 - IEEE International Magnetics Conference [1001211] (INTERMAG Europe 2002 - IEEE International Magnetics Conference). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/INTMAG.2002.1001211