MAGNETIC PROPERTIES AND INTERPARTICLE MAGNETIC INTERACTIONS IN POWDER SAMPLES OF MAGNETITE AND MAGNESIUM OXIDE MIXTURES

1 VÍTKOVSKÁ Nikola
Co-authors:
1,2 LUŇÁČEK Jiří 1,2 ŽIVOTSKÝ Ondřej 1,3 JANDAČKA Petr 1,2 DVORSKÝ Richard
Institutions:
1 Institute of Physics, VŠB-Technical University of Ostrava, 17.listopadu 15, 708 33 Ostrava-Poruba, Czech Republic, nikola.vitkovska@vsb.cz
2 Regional Materials Science and Technology Centre, VŠB-Technical University of Ostrava, 17.listopadu 15, 708 33 Ostrava-Poruba, Czech Republic
3 IT4InnovationsCentre, VŠB-Technical University of Ostrava, 17.listopadu 15, 708 33 Ostrava-Poruba, Czech Republic
Conference:
7th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 14th - 16th 2015
Proceedings:
Proceedings 7th International Conference on Nanomaterials - Research & Application
Pages:
626-630
ISBN:
978-80-87294-59-8
ISSN:
2694-930X
Published:
11th January 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
17 views / 3 downloads
Abstract

In this paper, magnetic properties and interparticle magnetic interactions of the powder mixtures consisting of a ferromagnetic magnetite (mean particle size about 50 nm) and diamagnetic MgO (micrometric particles) are presented. Mixtures with concentrations of Fe3O4 from 10 to 80 wt. % were prepared using two methods: ultrasonic homogenization and manual mechanical mixing. Additionally the powder mixtures were mechanically pressed in a specially developed device to produce samples in form of pills with the diameter of 10 mm. An EV9 MicroSense vibrating sample magnetometer (VSM) was used for measurements of the virgin curves and magnetization loops. Both measured quantities were used for construction of the Henkel plots that indicate the behavior of the magnetic interparticle interactions of prepared samples. We have discovered that the sample with 30 wt. %of Fe3O4 exhibited the most intensive interparticle interactions and at the same timethe highest value of the remnantand saturation magnetization.

Keywords: Magnetite nanoparticles; vibrating sample magnetometer, Henkel plot; ultrasonic homogenization
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