30 December 2016 Quantum-mechanical relaxation model for characterization of fine particles magnetic dynamics in an external magnetic field
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Proceedings Volume 10224, International Conference on Micro- and Nano-Electronics 2016; 102240B (2016) https://doi.org/10.1117/12.2267172
Event: The International Conference on Micro- and Nano-Electronics 2016, 2016, Zvenigorod, Russian Federation
Abstract
Principal difference of magnetic nanoparticles from the bulk matter which cannot be ignored when constructing upon them combined metamaterials and modern devices is the essential influence on their behavior thermal fluctuations of the environment. These disturbances lead to specific distributions of the particles characteristics and to stochastic reorientations of their magnetic moments. On the basis of quantum-mechanical representation of the particle possessing intrinsic magnetic anisotropy and being placed onto the external magnetic field we developed general approach to describe equilibrium magnetization curves and relaxation Mössbauer spectra of magnetic nanoparticles for diagnostics of magnetic nanomaterials in the whole temperature or external field ranges. This approach has universal character and may be applied not only to the systems under thermal equilibrium, but may in principle describe macroscopic dynamical phenomena such as magnetization reversal.
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I. Mischenko, M. Chuev, "Quantum-mechanical relaxation model for characterization of fine particles magnetic dynamics in an external magnetic field ", Proc. SPIE 10224, International Conference on Micro- and Nano-Electronics 2016, 102240B (30 December 2016); doi: 10.1117/12.2267172; https://doi.org/10.1117/12.2267172
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