Statistics of irreversible displacements of domain walls in nanowires

    Authors

    A. A. Ivanov; V. A. Orlov; M. V. Erementchouk;N. N. Podolsky

    Comments

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    Abbreviated Journal Title

    Eur. Phys. J. B

    Keywords

    ULTRADISPERSE FERROMAGNETS; ANODIC ALUMINA; NI NANOWIRES; MAGNETIZATION; ANISOTROPY; ARRAYS; PORES; FE; MEDIA; CO; Physics, Condensed Matter

    Abstract

    The process of quasistatic displacement of domain walls is considered in a nanowire represented as a one-dimensional chain of ferromagnet crystallites. The domain wall pinning due to spatial fluctuations of the anisotropy axes is analyzed. Based on the theory of overshoots of random processes, we have calculated the distribution functions of the initial susceptibility and of the maximal force of interaction of the domain wall with inhomogeneities. These functions are found to be non-Gaussian. We have derived expressions for the magnetization curve and the coercive force, which depend on the length of the chain.

    Journal Title

    European Physical Journal B

    Volume

    83

    Issue/Number

    1

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    83

    Last Page

    91

    WOS Identifier

    WOS:000295334400013

    ISSN

    1434-6028

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