Abstract
We present a simple model which allows to describe a three-dimensional ferromagnetic nanorod placed in a strong external magnetic field as a one-dimensional chain of what we call superspins (a collection of pseudospins). Main properties like interaction energy, spatial inhomogeneity of magnetization, and ferromagnetic resonance frequency are reproduced with great accuracy. Within presented framework, we discuss the double ferromagnetic resonance occurring in nanostructures.
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