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Modelling the effec...
Modelling the effect of different core sizes and magnetic interactions inside magnetic nanoparticles on hyperthermia performance
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- Jonasson, Christian (author)
- RISE,Acreo
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- Schaller, Vincent, 1979 (author)
- RISE,Acreo
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- Zeng, Lunjie (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Sweden
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- Olsson, Eva (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Sweden
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- Frandsen, C. (author)
- Danmarks Tekniske Universitet,Technical University of Denmark,DTU Technical University of Denmark, Denmark
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- Castro, Alejandra (author)
- Solve AB, Sweden
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- Nilsson, Lars (author)
- Solve AB, Sweden
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- Bogart, Lara K. (author)
- University College London (UCL),University College London, UK
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- Southern, P. (author)
- University College London (UCL),University College London, UK
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- Pankhurst, Q. A. (author)
- University College London (UCL),University College London, UK
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- Puerto Morales, M. (author)
- CSIC - Instituto de Ciencia de Materiales de Madrid (ICMM),Institute of Material Science of Madrid, Spain
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- Johansson, Christer (author)
- RISE Research Institutes of Sweden
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(creator_code:org_t)
- Elsevier BV, 2019
- 2019
- English.
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In: Journal of Magnetism and Magnetic Materials. - : Elsevier BV. - 0304-8853 .- 1873-4766. ; 477, s. 198-202
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Abstract
Subject headings
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- We present experimental intrinsic loss power (ILP) values, measured at an excitation frequency of 1 MHz and at relatively low field amplitudes of 3.4–9.9 kA/m, as a function of the mean core diameter, for selected magnetic nanoparticles (MNPs). The mean core sizes ranged from ca. 8 nm to 31 nm. Transmission electron microscopy indicated that those with smaller core sizes (less than ca. 22 nm) were single-core MNPs, while those with larger core sizes (ca. 29 nm to 31 nm) were multi-core MNPs. The ILP data showed a peak at core sizes of ca. 20 nm. We show here that this behaviour correlates well with the predicted ILP values obtained using either a non-interacting Debye model, or via dynamic Monte-Carlo simulations, the latter including core-core magnetic interactions for the multi-core particles. This alignment of the models is a consequence of the low field amplitudes used. We also present interesting results showing that the core-core interactions affect the ILP value differently depending on the mean core size.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Single-core particles
- Magnetic interactions
- Magnetic relaxation
- Multi-core particles
- Monte-Carlo simulations
- Magnetic nanoparticles
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Jonasson, Christ ...
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Schaller, Vincen ...
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Zeng, Lunjie
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Olsson, Eva
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Frandsen, C.
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Castro, Alejandr ...
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show more...
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Nilsson, Lars
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Bogart, Lara K.
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Southern, P.
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Pankhurst, Q. A.
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Puerto Morales, ...
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Johansson, Chris ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Other Physics To ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Journal of Magne ...
- By the university
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Chalmers University of Technology
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RISE