Direct observation of magnetic metastability in individual iron nanoparticles

Balan, Ana; Derlet, Peter M.; Rodríguez, Arantxa Fraile; Bansmann, Joachim; Yanes Díaz, Rocio; Nowak, Ulrich; Kleibert, Armin; Nolting, Frithjof

Direct observation of magnetic metastability in individual iron nanoparticles

Files

Balan_279163.pdf(936.25 KB)

Date

2014

Authors

Balan, Ana

Derlet, Peter M.

Rodríguez, Arantxa Fraile

Bansmann, Joachim

Yanes Díaz, Rocio

Nowak, Ulrich

Kleibert, Armin

Nolting, Frithjof

Publication type

Journal article

Published in

Physical Review Letters ; 112 (2014), 10. - ISSN 0031-9007. - eISSN 1079-7114

Abstract

X-ray photoemission electron microscopy combined with x-ray magnetic circular dichroism is used to study the magnetic properties of individual iron nanoparticles with sizes ranging from 20 down to 8 nm. While the magnetocrystalline anisotropy of bulk iron suggests superparamagnetic behavior in this size range, ferromagnetically blocked particles are also found at all sizes. Spontaneous transitions from the blocked state to the superparamagnetic state are observed in single particles and suggest that the enhanced magnetic energy barriers in the ferromagnetic particles are due to metastable, structurally excited states with unexpected life times.

Subject (DDC)

530 Physics

Cite This

ISO 690

BALAN, Ana, Peter M. DERLET, Arantxa Fraile RODRÍGUEZ, Joachim BANSMANN, Rocio YANES DÍAZ, Ulrich NOWAK, Armin KLEIBERT, Frithjof NOLTING, 2014. Direct observation of magnetic metastability in individual iron nanoparticles. In: Physical Review Letters. 112(10). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.112.107201

BibTex

@article{Balan2014Direc-27916,
  year={2014},
  doi={10.1103/PhysRevLett.112.107201},
  title={Direct observation of magnetic metastability in individual iron nanoparticles},
  number={10},
  volume={112},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Balan, Ana and Derlet, Peter M. and Rodríguez, Arantxa Fraile and Bansmann, Joachim and Yanes Díaz, Rocio and Nowak, Ulrich and Kleibert, Armin and Nolting, Frithjof}
}

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Bibliography of Konstanz

Yes