Structural and magnetic characterization of self-assembled iron oxide nanoparticle arrays.
J Phys Condens Matter
; 23(12): 126003, 2011 Mar 30.
Article
in En
| MEDLINE
| ID: mdl-21378441
ABSTRACT
We report about a combined structural and magnetometric characterization of self-assembled magnetic nanoparticle arrays. Monodisperse iron oxide nanoparticles with a diameter of 20 nm were synthesized by thermal decomposition. The nanoparticle suspension was spin-coated on Si substrates to achieve self-organized arrays of particles and subsequently annealed at various conditions. The samples were characterized by x-ray diffraction, and bright and dark field high resolution transmission electron microscopy. The structural analysis is compared to magnetization measurements obtained by superconducting quantum interference device magnetometry. We can identify either multi-phase Fe(x)O/γ-Fe(2)O(3) or multi-phase Fe(x)O/Fe(3)O(4) nanoparticles. The Fe(x)O/γ-Fe(2)O(3) system shows a pronounced exchange bias effect which explains the peculiar magnetization data found for this system.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Ferric Compounds
/
Nanoparticles
/
Magnetics
Language:
En
Journal:
J Phys Condens Matter
Journal subject:
BIOFISICA
Year:
2011
Document type:
Article
Affiliation country:
Germany
Publication country:
ENGLAND
/
ESCOCIA
/
GB
/
GREAT BRITAIN
/
INGLATERRA
/
REINO UNIDO
/
SCOTLAND
/
UK
/
UNITED KINGDOM