Magnetic properties of superparamagnetic gamma-Fe2O3 nanoparticles prepared by coprecipitation technique

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dc.contributor.authorJeong, JRko
dc.contributor.authorShin, Sung-Chulko
dc.contributor.authorLee, SJko
dc.contributor.authorKim, Jong-Dukko
dc.date.accessioned2009-12-03T02:33:46Z-
dc.date.available2009-12-03T02:33:46Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2005-02-
dc.identifier.citationJOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.286, pp.5 - 9-
dc.identifier.issn0304-8853-
dc.identifier.urihttp://hdl.handle.net/10203/14043-
dc.description.abstractgamma-Fe2O3 nanoparticles have been synthesized by a chemical coprecipitation technique using the typical pipette drop method and the novel piezoelectric nozzle method. Nanoparticles made by the piezoelectric nozzle method show smaller size and very narrow size distribution compared to the nanoparticles produced by the pipette drop method. The superconducting quantum interference device (SQUID) measurements show superparamagnetism of nanoparticles and reveal that the anisotropy constants of the nanoparticles made by the pipette drop method and the piezoelectric nozzle method are 2.2 x 10(6) and 9.0 x 10(6) erg/cm(3), respectively. By measuring the magnetic relaxation of the magnetization at 5 K, we also obtained magnetic viscosity of gamma-(FeO3)-O-2 nanoparticles. (C) 2004 Elsevier B.V. All rights reserved.-
dc.description.sponsorshipThis work was supported by Ministry of Science and Technology through the Creative Research Initiatives Project and Center for Ultramicrochem- ical Process Systems Project. The authors would like to express sincere thanks to Dr. Sang-Jun Oh in KBSI for helping in SQUID measurements.en
dc.languageEnglish-
dc.language.isoen_USen
dc.publisherELSEVIER SCIENCE BV-
dc.subjectVISCOSITY-
dc.titleMagnetic properties of superparamagnetic gamma-Fe2O3 nanoparticles prepared by coprecipitation technique-
dc.typeArticle-
dc.identifier.wosid000226638400003-
dc.identifier.scopusid2-s2.0-11444253377-
dc.type.rimsART-
dc.citation.volume286-
dc.citation.beginningpage5-
dc.citation.endingpage9-
dc.citation.publicationnameJOURNAL OF MAGNETISM AND MAGNETIC MATERIALS-
dc.embargo.liftdate9999-12-31-
dc.embargo.terms9999-12-31-
dc.contributor.localauthorShin, Sung-Chul-
dc.contributor.localauthorKim, Jong-Duk-
dc.contributor.nonIdAuthorJeong, JR-
dc.contributor.nonIdAuthorLee, SJ-
dc.type.journalArticleArticle; Proceedings Paper-
dc.subject.keywordAuthormaghemite-
dc.subject.keywordAuthorsuperparamagnetism-
dc.subject.keywordAuthorpiezoelectric nozzle method-
dc.subject.keywordPlusVISCOSITY-
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