Large structure-dependent room temperature exchange bias in self-assembled BiFeO3 nanoparticles
Sudipta Goswami,
Aditi Sahoo,
Dipten Bhattacharya
et al.
Abstract:We studied the magnetic properties of self-assembled aggregates of BiFeO 3 nanoparticles (∼20-40 nm). The aggregates formed two different structures -one with limited and another with massive crosslinking -via 'drying-mediated self-assembly' process following dispersion of the nanoparticles within different organic solvents. They exhibit large coercivity H C (>1000 Oe) and exchange bias field H E (∼350-900 Oe) in comparison to what is observed in isolated nanoparticles (H C ∼ 250 Oe; H E ∼ 0). The H E turns ou… Show more
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