Large Exchange Bias in Inverted Antiferromagnetic Ferrimagnetic Core Shell Nanoparticles

ALBERTO LÓPEZ-ORTEGA; MARTA ESTRADER; GERMAN SALAZAR-ALVAREZ; SÒNIA ESTRADÉ; DINA TOBIA; ELIN WINKLER; IGOR GOLOSOVSKY; JORDI SORT; FRANCESCA PEIRÓ; SANTIAGO SURIÑACH; ROBERTO ZYSLER; MARÍA DOLORS BARÓ; JOSEP NOGUÉS

Chennai

Conferencia; International Conference on Research in Condensed Matter Physics (ICCMP ? 2012); 2012

The interest in bimagnetic core/shell nanoparticles is steadily increasing due to the possibility to obtain enhanced magnetic properties. particularly, since the report on the use of exchange bias to overcome the superparamagnetic limit, the amount of experimental and theoretical work on passivated ferromagnetic (FM) nanoparticles coated with the corresponding antiferromagnetic (AFM) oxide layer has increased in recent years. Here we present the study of two inverted AFM-core/FiM-shell systems (MnO Mn3O4 and FeO Fe3O4) as opposed to the typical FM-core AFM-shell obtained from oxidation of transition metal nanoparticles.