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dc.title | Tailoring the magnetic properties and magnetorheological behavior of spinel nanocrystalline cobalt ferrite by varying annealing temperature | en |
dc.contributor.author | Sedlačík, Michal | |
dc.contributor.author | Pavlínek, Vladimír | |
dc.contributor.author | Peer, Petra | |
dc.contributor.author | Filip, Petr | |
dc.relation.ispartof | Dalton Transactions | |
dc.identifier.issn | 1477-9234 Scopus Sources, Sherpa/RoMEO, JCR | |
dc.date.issued | 2014 | |
utb.relation.volume | 43 | |
utb.relation.issue | 18 | |
dc.citation.spage | 6919 | |
dc.citation.epage | 6924 | |
dc.type | article | |
dc.language.iso | en | |
dc.publisher | Royal Society of Chemistry (RSC) | |
dc.identifier.doi | 10.1039/c4dt00166d | |
dc.description.abstract | Magnetic nanoparticles of spinel nanocrystalline cobalt ferrite were synthesized via the sol-gel method and subsequent annealing. The influence of the annealing temperature on the structure, magnetic properties, and magnetorheological effect was investigated. The finite crystallite size of the particles, determined by X-ray diffraction and the particle size observed via transmission electron microscopy, increased with the annealing temperature. The magnetic properties observed via a vibrating sample magnetometer showed that an increase in the annealing temperature leads to the increase in the magnetization saturation and, in contrast, a decrease in the coercivity. The effect of annealing on the magnetic properties of ferrite particles has been explained by the recrystallization process at high temperatures. This resulted in grain size growth and a decrease in an imposed stress relating to defects in the crystal lattice structure of the nanoparticles. The magnetorheological characteristics of suspensions of ferrite particles in silicone oil were measured using a rotational rheometer equipped with a magnetic field generator in both steady shear and small-strain oscillatory regimes. The magnetorheological performance expressed as a relative increase in the magnetoviscosity appeared to be significantly higher for suspensions of particles annealed at 1000 °C. This journal is © the Partner Organisations 2014. | en |
utb.faculty | University Institute | |
utb.faculty | Faculty of Technology | |
dc.identifier.uri | http://hdl.handle.net/10563/1003726 | |
utb.identifier.obdid | 43871796 | |
utb.identifier.scopus | 2-s2.0-84898028698 | |
utb.identifier.wok | 000334575500037 | |
utb.identifier.coden | DTARA | |
utb.source | j-scopus | |
dc.date.accessioned | 2014-06-05T20:21:47Z | |
dc.date.available | 2014-06-05T20:21:47Z | |
dc.description.sponsorship | Grant Agency of the Czech Republic [202/09/1626]; Operational Programme Research and Development for Innovations; European Regional Development Fund (ERDF); national budget of the Czech Republic [CZ.1.05/2.1.00/03.0111] | |
dc.rights.access | openAccess | |
utb.ou | Centre of Polymer Systems | |
utb.contributor.internalauthor | Sedlačík, Michal | |
utb.contributor.internalauthor | Pavlínek, Vladimír | |
utb.fulltext.affiliation | Michal Sedlacik,*a,b Vladimir Pavlinek,a,c Petra Peer d and Petr Filip d a Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Nad Ovcirnou 3685, 760 01 Zlin, Czech Republic. E-mail: msedlacik@ft.utb.cz; Fax: +420 57 603 1444; Tel: +420 57 603 8027 b Department of Production Engineering, Faculty of Technology, Tomas Bata University in Zlin, T. G. Masaryk Sq. 275, 762 72 Zlin, Czech Republic c Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, T. G. Masaryk Sq. 275, 762 72 Zlin, Czech Republic d Institute of Hydrodynamics, Academy of Sciences of the Czech Republic, Pod Patankou 5, 166 12 Prague 6, Czech Republic | |
utb.fulltext.dates | Received 16th January 2014 Accepted 12th February 2014 | |
utb.fulltext.sponsorship | The authors would like to thank the Grant Agency of the Czech Republic (202/09/1626) for financial support. This article was written with the support of Operational Programme Research and Development for Innovations co-funded by the European Regional Development Fund (ERDF) and the national budget of the Czech Republic, within the framework of the project Centre of Polymer Systems (reg. number: CZ.1.05/2.1.00/03.0111). | |
utb.fulltext.faculty | Faculty of Technology | |
utb.fulltext.faculty | University Institute | |
utb.fulltext.ou | Department of Production Engineering | |
utb.fulltext.ou | Centre of Polymer Systems |