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dc.creatorTadić, Marin
dc.creatorCitakovic, Nada
dc.creatorPanjan, Matjaž
dc.creatorStanojević, Boban
dc.creatorMarković, Dragana
dc.creatorJovanović, Đorđe
dc.creatorSpasojević, Vojislav
dc.date.accessioned2018-03-01T22:57:17Z
dc.date.available2018-03-01T22:57:17Z
dc.date.issued2012
dc.identifier.issn0925-8388
dc.identifier.urihttps://vinar.vin.bg.ac.rs/handle/123456789/5168
dc.description.abstractWe found novel and superior magnetic properties of the hematite (alpha-Fe2O3) that originate from an internal microstructure of particles and strong inter-particle interactions between nanocrystal sub-units. The hematite particles were synthesized by thermal decomposition of iron (III) nitrate without any template or surfactant. The purity, size, crystallinity, morphology, microstructure and magnetic features of the as-prepared particles were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), Raman spectroscopy (RS) and SQUID magnetometry. An XRD study reveals a pure phase of alpha-Fe2O3 whereas TEM shows alpha-Fe2O3 spheres with a diameter of about 150 nm. RS also shows high quality and purity of the sample. Moreover, TEM and HRTEM images show a pomegranate-like superstructure and evidence that the spherical particles are composed of individual well-crystallized nanoparticle sub-units (self-assembled nanoparticles) with a size of about 20 nm. Magnetic measurements display hysteretic behavior at the room temperature with remanent magnetization M-r = 0.731 emu/g, saturation magnetization M-S = 6.83 emu/g and coercivity H-C = 4350 Oe, as well as the Morin transition at T-M = 261 K. These results and comparison with those in the literature reveal that the sample has extremely high coercivity. The magnetic properties of the sample are discussed in relation to morphology, internal microstructure, surface effects and exchange and dipole-dipole interactions. (C) 2012 Elsevier B.V. All rights reserved.en
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45015/RS//
dc.rightsrestrictedAccessen
dc.sourceJournal of Alloys and Compoundsen
dc.subjectHematite (alpha-Fe2O3)en
dc.subjectIron oxideen
dc.subjectCoercivityen
dc.subjectSelf-assembly nanoparticlesen
dc.subjectMagnetic propertiesen
dc.subjectMorin temperatureen
dc.titleSynthesis, morphology and microstructure of pomegranate-like hematite (alpha-Fe2O3) superstructure with high coercivityen
dc.typearticleen
dcterms.abstractСпасојевић Војислав; Цитаковиц, Нада; Марковиц, Драгана; Јовановиц, Дорде; Пањан, Матјаз; Тадић Марин; Станојевић Бобан;
dc.citation.volume543
dc.citation.spage118
dc.citation.epage124
dc.identifier.wos000311195000021
dc.identifier.doi10.1016/j.jallcom.2012.07.047
dc.citation.rankM21a
dc.identifier.scopus2-s2.0-84865828419


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