Magnetic, structural, and particle size analysis of single- and multi-core magnetic nanoparticles

Frank Ludwig*, Olga Kazakova, Luis Fernández Barquín, Andrea Fornara, Lutz Trahms, Uwe Steinhoff, Peter Svedlindh, Erik Wetterskog, Quentin A. Pankhurst, Paul Southern, Puerto Morales, Mikkel Fougt Hansen, Cathrine Frandsen, Eva Olsson, Stefan Gustafsson, Nicole Gehrke, Kerstin Lüdtke-Buzug, Cordula Grüttner, Christian Jonasson, Christer Johansson

*Corresponding author for this work
17 Citations (Scopus)


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.

Original languageEnglish
Article number6971714
JournalIEEE Transactions on Magnetics
Issue number11
Publication statusPublished - 01.11.2014

Research Areas and Centers

  • Academic Focus: Biomedical Engineering


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