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Spin disorder and magnetic anisotropy in Fe3O4 nanoparticles
Open accessAbstract
We have studied the magnetic behavior of dextran-coated magnetite (Fe3O4) nanoparticles with median particle size ⟨d⟩=8nm. Magnetization curves and in-field Mössbauer spectroscopy measurements showed that the magnetic moment MS of the particles was much smaller than the bulk material. However, we found no evidence of magnetic irreversibility or nonsaturating behavior at high fields, usually associated to spin canting. The values of magnetic anisotropy Keff from different techniques indicate that surface or shape contributions are negligible. It is proposed that these particles have bulklike ferromagnetic structure with ordered A and B sublattices, but nearly compensated the magnetic moments. The dependence of the blocking temperature with frequency and applied fields, TB(H,ω), suggests that the observed nonmonotonic behavior is governed by the strength of interparticle interactions.
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Thermal Fluctuations of a Single-Domain Particle
Brown, W. F. (1963) · Physical Review · doi:10.1103/physrev.130.1677 · Cited by 3,374
Cited by
Santoyo Salazar, J., Perez, L., de Abril, O., Truong Phuoc, L., Ihiawakrim, D., Vazquez, M., Greneche, J.-M., Begin-Colin, S., & Pourroy, G. (2011) · Chemistry of Materials · doi:10.1021/cm103188a · Cited by 375
Dennis, C. L., Jackson, A. J., Borchers, J. A., Hoopes, P. J., Strawbridge, R., Foreman, A. R., van Lierop, J., Grüttner, C., & Ivkov, R. (2009) · Nanotechnology · doi:10.1088/0957-4484/20/39/395103 · Cited by 254
Mojica Pisciotti, M. L., Lima, E., Vasquez Mansilla, M., Tognoli, V. E., Troiani, H. E., Pasa, A. A., Creczynski‐Pasa, T. B., Silva, A. H., Gurman, P., Colombo, L., et al. (2014) · Journal of Biomedical Materials Research Part B Applied Biomaterials · doi:10.1002/jbm.b.33068 · Cited by 87
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Metadata
- Authors
- Lima, E., Brandl, A. L., Arelaro, A. D., & Goya, G. F.
- Venue
- Journal of Applied Physics
- Publisher
- AIP Publishing
- Published
- 2006-04-15
- Volume
- 99
- Issue
- 8
- ISSN
- 0021-8979 (ISSN-L)
- 1089-7550
- OpenAlex
- W1861223224
- Cited by
- 184
- References
- 1
- FWCI
- 4.99
- Type
- journal article
- Language
- en
- Open access
- green
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- Lima, E., Brandl, A. L., Arelaro, A. D., & Goya, G. F. (2006). Spin disorder and magnetic anisotropy in Fe3O4 nanoparticles. Journal of Applied Physics. https://doi.org/10.1063/1.2191471
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