Synthesis of monodisperse CoPt nanoparticles: Structural and magnetic properties

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dc.authoridKaradag, Faruk/0000-0001-7862-9085
dc.authoridAkyol, Mustafa/0000-0001-8584-0620
dc.authoridKaya, Dogan/0000-0002-6313-7501
dc.authoridEkicibil, Ahmet/0000-0003-3071-0444
dc.contributor.authorKaya, Dogan
dc.contributor.authorAdanur, Idris
dc.contributor.authorAkyol, Mustafa
dc.contributor.authorKaradag, Faruk
dc.contributor.authorEkicibil, Ahmet
dc.date.accessioned2025-01-06T17:37:13Z
dc.date.available2025-01-06T17:37:13Z
dc.date.issued2021
dc.description.abstractWe have investigated CoPt nanoparticles by the simultaneous reduction of Pt (acac)(2) and Co (acac)(2) with polyol method under N-2 atmosphere. The formation of CoPt nanoparticles requires further study of possible increased Pt concentration and size effects on their structural and magnetic properties. We found that as-synthesized CoPt NPs exhibits a chemically disordered cubic phase in the compositions with an average crystalize size of 4.44 nm confirmed by X-ray diffraction (XRD) method and Rietveld refinement analyses. Uniformly distributed the average cluster size of CoPtx nanoparticles decreased from 13.7 nm to 7.6 nm with decreased Pt concentration from 2.3 to 0.5 which determined by scanning electron microscopy (SEM). Magnetic properties are characterized by vibrating sample magnetometer (VSM) for zero field cooled (ZFC) and field cooled (FC) conditions between 5 and 300 K and applied field up to +/- 5 T. Magnetic results indicate that the Co rich CoPtx nanoparticles exhibit large coercive field up to 1358 Oe at 5 K and this value decrease with increasing temperature and Pt concentration for all samples. Due to a transition from ferromagnetic to a superparamagnetic phase with elevated temperature, coercivity and exchange bias nearly vanished for all samples. (C) 2020 Elsevier B.V. All rights reserved.
dc.description.sponsorshipCukurova University, Adana, Turkey [FBA-2018-10412]
dc.description.sponsorshipThis work was supported by Cukurova University, Adana, Turkey, under Scientific Research Funding Grand No: FBA-2018-10412
dc.identifier.doi10.1016/j.molstruc.2020.128999
dc.identifier.issn0022-2860
dc.identifier.issn1872-8014
dc.identifier.scopus2-s2.0-85089069558
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.molstruc.2020.128999
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2141
dc.identifier.volume1224
dc.identifier.wosWOS:000598739700014
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofJournal of Molecular Structure
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectCoPt
dc.subjectMagnetic nanoparticles
dc.subjectSuperparamagnetism
dc.subjectPolyol
dc.titleSynthesis of monodisperse CoPt nanoparticles: Structural and magnetic properties
dc.typeArticle

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