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Published on: September 6, 2012
Synthetic control over magnetic moment and exchange bias in all-oxide materials encapsulated within a spherical
Michael T Klem1, Damon A Resnick, Keith Gilmore
1Department of Chemistry and Biochemistry, Center for Bio-Inspired Nanomaterials, Montana State University, Bozeman, Montana 59717, USA.
Abstract:
This work focuses on the synthetic control of magnetic properties of mixed oxide magnetic nanoparticles of the general formula Fe(3-x)Co(x)O(4) (x < or = 0.33) in the protein cage ferritin. In this biomimetic approach, variations in the chemical synthesis result in the formation of single-phase Fe(3-x)Co(x)O(4) alloys or intimately mixed binary phase Fe/Co oxides, modifying the chemical structure and magnetic behavior of these particles, as characterized by static and dynamic magnetization measurements and X-ray absorption spectroscopy.
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