Publication detail

Magnetic properties and morphology of ultra-small iron oxide nanoparticles

PIZÚROVÁ, N. BURŠÍK, J. SOJKOVÁ, T. ROUPCOVÁ, P. SCHNEEWEISS, O.

Original Title

Magnetic properties and morphology of ultra-small iron oxide nanoparticles

Type

conference paper

Language

English

Original Abstract

Maghemite nanoparticles prepared with the modified synthesis method published by Sun et al. 2004 and followed by filtering to extract a sample of the smallest nanoparticle size were investigated. The 2-5 nm nanoparticles of monocrystalline and multi-twinned morphology without surface shells were observed. Superparamagnetic behavior was detected above the temperature of 40 K. An exchange bias loop shift of ~ 2 mT at 3 K after cooling with an external field of 3 T suggested a low influence of the surface spin disorder effect. Mössbauer spectroscopy confirmed the two phases with different blocking temperatures, the maghemite phase as well as a second one likely originating from the disordered surface component.

Keywords

Iron oxides; Nanomagnetics; Nanoparticles; Synthesis (chemical)

Authors

PIZÚROVÁ, N.; BURŠÍK, J.; SOJKOVÁ, T.; ROUPCOVÁ, P.; SCHNEEWEISS, O.

Released

4. 10. 2021

ISBN

1742-6596

Periodical

Journal of Physics: Conference Series

Year of study

2315

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

7

Pages count

7

BibTex

@inproceedings{BUT182600,
  author="Naděžda {Pizúrová} and Jan {Buršík} and Tereza {Sojková} and Pavla {Roupcová} and Oldřich {Schneeweiss}",
  title="Magnetic properties and morphology of ultra-small iron oxide nanoparticles",
  booktitle="Journal of Physics: Conference Series",
  year="2021",
  journal="Journal of Physics: Conference Series",
  volume="2315",
  number="1",
  pages="1--7",
  doi="10.1088/1742-6596/2315/1/012023",
  issn="1742-6596"
}