Giant-spin nonlinear response theory of magnetic nanoparticle hyperthermia: a field dependence study
| Autor: | Andris F. Bakuzis, Marcus S. Carrião, Victor R. R. Aquino, Gabriel T. Landi, E. L. Verde, Marcelo Henrique Sousa |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Physics Condensed Matter - Materials Science Condensed matter physics Field (physics) Condensed Matter - Mesoscale and Nanoscale Physics General Physics and Astronomy Field dependence Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Nonlinear system Magnetization Exact solutions in general relativity Magnetic particle imaging Amplitude 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0210 nano-technology Spin-½ |
| DOI: | 10.48550/arxiv.1702.02022 |
| Popis: | Understanding high-field amplitude electromagnetic heat loss phenomena is of great importance, in particular in the biomedical field, since the heat-delivery treatment plans might rely on analytical models that are only valid at low field amplitudes. Here, we develop a nonlinear response model valid for single- domain nanoparticles of larger particle sizes and higher field amplitudes in comparison to linear response theory. A nonlinear magnetization expression and a generalized heat loss power equation are obtained and compared with the exact solution of the stochastic Landau-Lifshitz-Gilbert equation assuming the giant-spin hypothesis. The model is valid within the hyperthermia therapeutic window and predicts a shift of optimum particle size and distinct heat loss field amplitude exponents. Experimental hyperthermia data with distinct ferrite-based nanoparticles, as well as third harmonic magnetization data supports the nonlinear model, which also has implications for magnetic particle imaging and magnetic thermometry. Comment: 14 pages, 5 figures and 52 references |
| Databáze: | OpenAIRE |
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