Abstract
The magnetic properties of nonstoichiometric cobalt ferrite nanocrystals differing by their sizes were investigated by magnetic measurements and Fe57 Mössbauer spectroscopy. We found that the spin-wave Bloch exponent increases with increasing particle size, in agreement with previous studies. Under a magnetic field of 7 T, we observed that the partial reorientation of the two ferrimagnetic Fe3+ sublattice magnetizations towards the field direction increases with increasing the particle size; we discuss the applicability of an intrinsic spin canting model as a function of the particle size. An evaluation of the relative amounts of cobalt and iron in each spinel site is given.
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Dates
Type | When |
---|---|
Created | 23 years ago (July 26, 2002, 10:14 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 5, 2024, 7:40 p.m.) |
Indexed | 1 month, 2 weeks ago (July 7, 2025, 9:06 a.m.) |
Issued | 24 years, 5 months ago (March 15, 2001) |
Published | 24 years, 5 months ago (March 15, 2001) |
Published Print | 24 years, 5 months ago (March 15, 2001) |
@article{Ngo_2001, title={Spin canting and size effects in nanoparticles of nonstoichiometric cobalt ferrite}, volume={89}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1347001}, DOI={10.1063/1.1347001}, number={6}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Ngo, A. T. and Bonville, P. and Pileni, M. P.}, year={2001}, month=mar, pages={3370–3376} }