1 Department of Micro- and Nanotechnology, Technical University of Denmark2 Magnetic Systems, Department of Micro- and Nanotechnology, Technical University of Denmark3 Department of Physics, Technical University of Denmark4 Experimental Surface and Nanomaterials Physics, Department of Physics, Technical University of Denmark5 Technische Universität Braunschweig6 National Physical Laboratory7 University of Cantabria8 SP Technical Research Institute of Sweden9 Physikalisch-Technische Bundesanstalt10 Uppsala University11 University College London12 Chalmers University of Technology13 nanoPET Pharma GmbH14 University of Lübeck15 Micromod Partikeltechnologie GmbH16 Acreo AB17 SP Technical Research Institute of Sweden18 Acreo AB
We have measured and analyzed three different commercial magnetic nanoparticle systems, both multi-core and single-core in nature, with the particle (core) size ranging from 20 to 100 nm. Complementary analysis methods and same characterization techniques were carried out in different labs and the results are compared with each other. The presented results primarily focus on determining the particle size—both the hydrodynamic size and the individual magnetic core size—as well as magnetic and structural properties. The used analysis methods include transmission electron microscopy, static and dynamic magnetization measurements, and Mössbauer spectroscopy. We show that particle (hydrodynamic and core) size parameters can be determined from different analysis techniques and the individual analysis results agree reasonably well. However, in order to compare size parameters precisely determined from different methods and models, it is crucial to establish standardized analysis methods and models to extract reliable parameters from the data.
Ieee Transactions on Magnetics, 2014, Vol 50, Issue 11, p. 1-4
Fields, Waves and Electromagnetics; Atmospheric measurements; Magnetic cores; Magnetic resonance imaging; Nanoparticles; Particle measurements; Perpendicular magnetic anisotropy