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- W1989484168 abstract "In this work, we used numerical simulations to study the magnetic ground state of the thin elongated (elliptical) ferromagnetic nano-islands made of Permalloy. In these systems, the effects of demagnetization of dipolar source generate a strong magnetic anisotropy due to particle shape, defining two fundamental magnetic ground state configurations—vortex or type C. To describe the system, we considered a model Hamiltonian in which the magnetic moments interact through exchange and dipolar potentials. We studied the competition between the vortex states and aligned states—type C—as a function of the shape of each elliptical nano-islands and constructed a phase diagram vortex—type C state. Our results show that it is possible to obtain the elongated nano-islands in the C-state with aspect ratios less than 2, which is interesting from the technological point of view because it will be possible to use smaller islands in spin ice arrays. Generally, the experimental spin ice arrangements are made with quite elongated particles with aspect ratio approximately 3 to ensure the C-state." @default.
- W1989484168 created "2016-06-24" @default.
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- W1989484168 date "2014-09-02" @default.
- W1989484168 modified "2023-09-27" @default.
- W1989484168 title "Ground state study of the thin ferromagnetic nano-islands for artificial spin ice arrays" @default.
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- W1989484168 doi "https://doi.org/10.1063/1.4894252" @default.
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