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Particle Moment Canting in CoFe2O4 Nanoparticles

Published

Author(s)

K. Hasz, Y. Ijiri, Kathryn L. Krycka, Julie Borchers, R. A. Booth, S. Oberdick, S. A. Majetich

Abstract

Polarization-analyzed small-angle neutron scattering methods are used to determine the spin morphology in high crystalline anisotropy, 11 nm diameter CoFe2O4 nanoparticle assemblies with randomly oriented easy axes. In moderate to high magnetic fields, the nanoparticles adopt a uniformly canted structure, rather than forming domains, shells or other arrangements. The observed canting angles agree quantitatively with those predicted from an energy model dominated by Zeeman and anisotropy competition, with implications for the technological use of such nanoparticles.
Citation
Physical Review B
Volume
90
Issue
18

Keywords

SANS, magnetic nanoparticles, magnetic anisotropy, moment canting, polarized neutron scattering

Citation

Hasz, K. , Ijiri, Y. , Krycka, K. , Borchers, J. , Booth, R. , Oberdick, S. and Majetich, S. (2014), Particle Moment Canting in CoFe<sub>2</sub>O<sub>4</sub> Nanoparticles, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=917214 (Accessed April 17, 2024)
Created November 18, 2014, Updated October 12, 2021