Summary
We study the magnetic state of Ising-type structures consisting of ferromagnetic nano-granules (dipoles) with dipolar magnetic interaction. Two types of the structures are considered: (1) 3D and 2D lattices populated fully or partially by ferromagnetic granules, and (2) 3D and 2D spatially random systems of granules. A variety of granules’ forms are also have been taken into account: we consider point and spherical dipoles, rod-like dipoles, and ellipsoidal (oblate and prolate) dipoles. For all those systems, the ground magnetic state of the systems, their magnetic properties, and Curie temperatures have been calculated precisely or approximately. In the latter case, the results have been obtained in the framework of the generalized mean-field theory, taking into account spatial variations of the local effective field by numerically and/or analytically calculating its distribution functions. Various practical realizations of the systems and their properties are discussed.
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Meilikhov, E., Farzetdinova, R. (2009). Ferromagnetism of Nanostructures Consisting of Ferromagnetic Granules with Dipolar Magnetic Interaction. In: Aktas, B., Mikailov, F. (eds) Advances in Nanoscale Magnetism. Springer Proceedings in Physics, vol 122. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-69882-1_14
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