Inkjet-printed Mn-Zn ferrite nanoparticle core for fluxgate

•Stable magnetic ink was prepared using 13 nm diameter Mn-Zn ferrite nanoparticles.•17 mm diameter 2.2 μm thick ring core was inkjet printed on PET foil.•Fluxgate sensor with this core achieved open-loop linear range of ± 1.5 mT. Non-planar fluxgate sensors measuring the magnetic fields in the μT ra...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2022-12, Vol.563, p.170003, Article 170003
Main Authors: Hrakova, Diana, Ripka, Pavel, Laposa, Alexandr, Novotny, David, Kroutil, Jiří, Povolný, Vojtěch, Kaman, Ondřej, Veverka, Pavel
Format: Article
Language:English
Subjects:
Additive manufacturing
Flexible magnetic sensor
Fluxgate
Inkjet printing
Soft magnetic nanoparticles
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Summary:•Stable magnetic ink was prepared using 13 nm diameter Mn-Zn ferrite nanoparticles.•17 mm diameter 2.2 μm thick ring core was inkjet printed on PET foil.•Fluxgate sensor with this core achieved open-loop linear range of ± 1.5 mT. Non-planar fluxgate sensors measuring the magnetic fields in the μT range are required for electric current, position, and torque transducers. We report the first sensor based on an inkjet-printed 17 mm diameter ring core. The sensor wide open-loop linear range of ± 1.5 mT allows to operate it without feedback. We describe the preparation of the very stable magnetic ink based on citrate-stabilized 13 nm diameter Mn-Zn ferrite nanoparticles that occur in superparamagnetic regime at room temperature. By printing 100 layers the total thickness of the inkjet-printed core was 2.2 µm. The achieved sensitivity was 10 mV/mT for 25 kHz excitation frequency.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2022.170003