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Título: | Magnetic anisotropy of maghemite nanoparticles probed by RF transverse susceptibility |
Autor: | Figueroa, A. I. CSIC ORCID; Bartolomé, Juan CSIC ORCID; García, L. M. CSIC; Bartolomé, Fernando CSIC ORCID; Arauzo, Ana B. CSIC ORCID; Millán, Ángel CSIC ORCID ; Palacio, Fernando CSIC ORCID | Palabras clave: | Iron oxide Transverse susceptibility Magnetic anisotropy Magnetic nanoparticles |
Fecha de publicación: | 2015 | Editor: | Elsevier | Citación: | Physics Procedia 75: 1050-1057 (2015) | Resumen: | We present radio frequency magnetic transverse susceptibility measurements on γ-Fe2O3 nanoparticles, which yield an estimation of their effective anisotropy constant, Keff as a function of nanoparticle size. The resulting values range from 4 to 8 × 104 erg/cm3, being on the order of the magnetocrystalline anisotropy in bulk maghemite. Keff values increase as the particle diameter increases. Evidences of anisotropy field distribution given by the size distribution in the samples, and interparticle interactions that increase as the particle size increases, are also observed in the TS measurements. The effects of such interparticle interaction overcome those of thermal fluctuations, in contrast with the behavior of other iron oxide particles. | Versión del editor: | https://doi.org/10.1016/j.phpro.2015.12.174 | URI: | http://hdl.handle.net/10261/147818 | DOI: | 10.1016/j.phpro.2015.12.174 | Identificadores: | doi: 10.1016/j.phpro.2015.12.174 e-issn: 1875-3884 issn: 1875-3892 |
Aparece en las colecciones: | (ICMA) Artículos |
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RFTransverse.pdf | 943,84 kB | Adobe PDF | Visualizar/Abrir |
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