Comment on "Magnetization of two-dimensional square arrays of nanomagnets"

    Authors

    M. A. Ortigoza; R. A. Klemm;T. S. Rahman

    Comments

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    Abbreviated Journal Title

    Phys. Rev. B

    Keywords

    Physics, Condensed Matter

    Abstract

    Recently, Takagaki and Ploog [Phys. Rev. B 71, 184439 (2005)] used a fourth-order Runge-Kutta technique to integrate the Landau-Lifschitz-Gilbert equations for square lattices of NxN magnetic nanodots with dipolar interdot interactions. Some of their results appeared to differ qualitatively from the second-order Runge-Kutta results obtained for the same systems by Kayali and Saslow [Phys. Rev. B 70, 174404 (2004)], both in the hysteresis area A(N) and in the number of steps of the magnetization hysteresis loops. We show that these differences are not due to inaccuracies in either calculation or to the potentially different magnetic induction sweep rates used, but can be attributed entirely to different choices of the dipolar interaction strength h(dip)proportional to a(-3), where a is the two-dimensional lattice constant.

    Journal Title

    Physical Review B

    Volume

    74

    Issue/Number

    22

    Publication Date

    1-1-2006

    Document Type

    Editorial Material

    Language

    English

    First Page

    4

    WOS Identifier

    WOS:000243195600097

    ISSN

    1098-0121

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