Superparamagnetic Behavior of MFe2O4 Nanoparticles and MFe2O4/SiO2 Composites (M: Co, Ni).
作者： V. Blanco-Gutierrez , M. Virumbrales , R. Saez-Puche , Maria J. Torralvo-Fernandez
DOI: 10.1021/JP4052648
关键词:
摘要: Two kinds of nanosized ferrite systems have been prepared: MFe2O4 nanoparticles and MFe2O4/SiO2 (M: Co, Ni) nanocomposites with different particle sizes. Magnetic measurements done for both in the 5–700 K temperature range, silica matrix effect on magnetic behavior has studied. Whereas CoFe2O4 samples are characterized by high anisotropy values, NiFe2O4 particles seem to be magnetically soft, which may favor dipolar interactions. The avoids all interactions that modify behavior. Therefore, 2–5 nm embedded Co-ferrite particles, a decreasing HC value increasing size is not observed. This almost constant indicates between surface spins absent this range. In case Ni-ferrite bulk moments minimized due presence SiO2 matrix.
acs.org
sci-hub.se 参考文章(30)
R. Sáez Puche, M. J. Torralvo Fernández, V. Blanco Gutiérrez, R. Gómez, V. Marquina, M. L. Marquina, J. L. Pérez Mazariego, R. Ridaura, Ferrites nanoparticles MFe2O4 (M = Ni and Zn): hydrothermal synthesis and magnetic properties Boletin De La Sociedad Espanola De Ceramica Y Vidrio. ,vol. 47, pp. 133- 137 ,(2008) , 10.3989/CYV.2008.V47.I3.189
Brian L. Cushing, Vladimir L. Kolesnichenko, Charles J. O'Connor, Recent advances in the liquid-phase syntheses of inorganic nanoparticles. Chemical Reviews. ,vol. 104, pp. 3893- 3946 ,(2004) , 10.1021/CR030027B
Pedro Tartaj, Superparamagnetic Composites: Magnetism with No Memory European Journal of Inorganic Chemistry. ,vol. 2009, pp. 333- 343 ,(2009) , 10.1002/EJIC.200800875
A.C. Tedesco, D.M. Oliveira, Z.G.M. Lacava, R.B. Azevedo, E.C.D. Lima, P.C. Morais, Investigation of the binding constant and stoichiometry of biocompatible cobalt ferrite-based magnetic fluids to serum albumin Journal of Magnetism and Magnetic Materials. ,vol. 272, pp. 2404- 2405 ,(2004) , 10.1016/J.JMMM.2003.12.375
John Jacob, M. Abdul Khadar, Investigation of mixed spinel structure of nanostructured nickel ferrite Journal of Applied Physics. ,vol. 107, pp. 114310- 114316 ,(2010) , 10.1063/1.3429202
Daliya S. Mathew, Ruey-Shin Juang, An overview of the structure and magnetism of spinel ferrite nanoparticles and their synthesis in microemulsions Chemical Engineering Journal. ,vol. 129, pp. 51- 65 ,(2007) , 10.1016/J.CEJ.2006.11.001
V. Blanco-Gutierrez, E. Climent-Pascual, M.J. Torralvo-Fernandez, R. Saez-Puche, M.T. Fernandez-Diaz, Neutron diffraction study and superparamagnetic behavior of ZnFe2O4 nanoparticles obtained with different conditions Journal of Solid State Chemistry. ,vol. 184, pp. 1608- 1613 ,(2011) , 10.1016/J.JSSC.2011.04.034
C. N. Chinnasamy, B. Jeyadevan, K. Shinoda, K. Tohji, D. J. Djayaprawira, M. Takahashi, R. Justin Joseyphus, A. Narayanasamy, Unusually high coercivity and critical single-domain size of nearly monodispersed CoFe2O4 nanoparticles Applied Physics Letters. ,vol. 83, pp. 2862- 2864 ,(2003) , 10.1063/1.1616655
Sergei P Gubin, Yurii A Koksharov, G B Khomutov, Gleb Yu Yurkov, Magnetic nanoparticles: preparation, structure and properties Russian Chemical Reviews. ,vol. 74, pp. 489- 520 ,(2005) , 10.1070/RC2005V074N06ABEH000897
D. Carta, M. F. Casula, A. Falqui, D. Loche, G. Mountjoy, C. Sangregorio, A. Corrias, A Structural and Magnetic Investigation of the Inversion Degree in Ferrite Nanocrystals MFe2O4 (M = Mn, Co, Ni)” Journal of Physical Chemistry C. ,vol. 113, pp. 8606- 8615 ,(2009) , 10.1021/JP901077C