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Title: Strongly exchange coupled inverse ferrimagnetic soft/hard, Mn(x)Fe(3-x)O(4)/Fe(x)Mn(3-x)O(4), core/shell heterostructured nanoparticles
Author: López-Ortega, Alberto
Estrader i Bofarull, Marta
Salazar-Alvarez, German
Estradé Albiol, Sònia
Golosovsky, Igor V.
Dumas, R.K.
Keavney, D.J.
Vasilakaki, Marianna
Trohidou, Kalliopi N.
Sort, Jordi
Peiró Martínez, Francisca
Suriñach, Santiago (Suriñach Cornet)
Baró, M. D.
Nogués, Josep
Keywords: Ferrita
Propietats magnètiques
Magnetic properties
Issue Date: 18-Jun-2012
Publisher: Royal Society of Chemistry
Abstract: Inverted soft/hard, in contrast to conventional hard/soft, bi-magnetic core/shell nanoparticles of Mn xFe 3-xO 4/Fe xMn 3-xO 4 with two different core sizes (7.5 and 11.5 nm) and fixed shell thickness (∼0.6 nm) have been synthesized. The structural characterization suggests that the particles have an interface with a graded composition. The magnetic characterization confirms the inverted soft/hard structure and evidences a strong exchange coupling between the core and the shell. Moreover, larger soft core sizes exhibit smaller coercivities and loop shifts, but larger blocking temperatures, as expected from spring-magnet or graded anisotropy structures. The results indicate that, similar to thin film systems, the magnetic properties of soft/hard core/shell nanoparticles can be fine tuned to match specific applications
Note: Versió postprint del document publicat a:
It is part of: Nanoscale, 2012, vol. 4, num. 16, p. 5138-5147
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ISSN: 2040-3364
Appears in Collections:Articles publicats en revistes (Química Inorgànica i Orgànica)
Publicacions de projectes de recerca finançats per la UE
Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)

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