Abstract
We have performed numerical simulations to evaluate responses of the magnetic moments of a single nanoparticle possessing uniaxial anisotropy and a planar nanoparticle lattice to excitation by a magnetic field pulse. The precession dynamics of magnetic moment for a wide range of the pulse parameters and the lattice anisotropy value has been studied. We have explored and analyzed periodic dependences of the response duration and the resulted orientation of the magnetic moments on the pulse duration and its amplitude. The effect of an additional noise signal on the lattice magnetization reversal is studied. The regimes of partial and complete magnetization reversal of dipole systems achievable only in the presence of noise have been revealed. We report on the conditions enabling the pulse magnetizations reversal most and least sensitive to the noise signal.
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Acknowledgements
The reported study was partially supported by the Ministry of Education and Science of the Russian Federation within the framework of the State task No. 3.6825.2017/BCh, and was partially funded by the Russian Foundation for Basic Research and the government of Ulyanovsk region of the Russian Federation, Grant No. 18-42-730001/19.
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Shutyi, A.M., Eliseeva, S.V. & Sementsov, D.I. Responses of an Isolated Anisotropic Magnetic Nanoparticle and Nanoparticle Lattice to a Magnetic Field Pulse. Appl Magn Reson 51, 409–429 (2020). https://doi.org/10.1007/s00723-020-01193-2
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DOI: https://doi.org/10.1007/s00723-020-01193-2