Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/52823
Title: Direct Observation of Magnetic Metastability in Individual Iron Nanoparticles
Author: Balan, Ana
Derlet, Peter M.
Fraile Rodríguez, Arantxa
Bansmann, Joachim
Yanes, Rocio
Nowak, Ulrik
Kleibert, Armin
Nolting, Frithjof
Keywords: Ferro
Nanopartícules
Metaestabilitat
Ferromagnetisme
Matèria condensada
Microscòpia electrònica
Iron
Nanoparticles
Metastability
Ferromagnetism
Condensed matter
Electron microscopy
Issue Date: 10-Mar-2014
Publisher: American Physical Society
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
Note: Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevLett.112.107201
It is part of: Physical Review Letters, 2014, vol. 112, p. 107201-1-107201-5
Related resource: http://dx.doi.org/10.1103/PhysRevLett.112.107201
URI: http://hdl.handle.net/2445/52823
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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