Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/176672
Title: | Size-Dependent passivation shell and magnetic properties in antiferromagnetic/ferrimagnetic core/shell MnO nanoparticles |
Author: | López-Ortega, Alberto Tobia, Dina Winkler, Elin Golosovsky, Igor V. Salazar-Alvarez, German Estradé Albiol, Sònia Estrader i Bofarull, Marta Sort, Jordi González, Miguel Suriñach, Santiago (Suriñach Cornet) Arbiol i Cobos, Jordi Peiró Martínez, Francisca Zysler, Roberto D. Baró, M. D. Nogués, Josep |
Keywords: | Nanopartícules Propietats magnètiques Nanoparticles Magnetic properties |
Issue Date: | 22-Jun-2010 |
Publisher: | American Chemical Society |
Abstract: | The magnetic properties of bimagnetic core/shell nanoparticles consisting of an antiferromagnetic MnO core and a ferrimagnetic passivation shell have been investigated. It is found that the phase of the passivation shell (γ-Mn2O3 or Mn3O4) depends on the size of the nanoparticles. Structural and magnetic characterizations concur that while the smallest nanoparticles have a predominantly γ-Mn2O3 shell, larger ones have increasing amounts of Mn3O4. A considerable enhancement of the Néel temperature, TN, and the magnetic anisotropy of the MnO core for decreasing core sizes has been observed. The size reduction also leads to other phenomena such as persistent magnetic moment in MnO up to high temperatures and an unusual temperature behavior of the magnetic domains. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1021/ja1021798 |
It is part of: | Journal of the American Chemical Society, 2010, vol. 132, num. 27, p. 9398-9407 |
URI: | http://hdl.handle.net/2445/176672 |
Related resource: | https://doi.org/10.1021/ja1021798 |
ISSN: | 0002-7863 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Electrònica i Biomèdica) Articles publicats en revistes (Química Inorgànica i Orgànica) Publicacions de projectes de recerca finançats per la UE |
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634870.pdf | 4.5 MB | Adobe PDF | View/Open |
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