Comparing Different Approaches to Form Cobalt Oxide Layer on CoPt Nanoparticles

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dc.contributor.authorKaya, Dogan
dc.contributor.authorAdanur, Idris
dc.contributor.authorAkyol, Mustafa
dc.contributor.authorKaradag, Faruk
dc.contributor.authorEkicibil, Ahmet
dc.date.accessioned2025-01-06T17:30:25Z
dc.date.available2025-01-06T17:30:25Z
dc.date.issued2020
dc.description.abstractWe have studied the effect of preparation methods, under argon gas and in the air environment, on the cobalt oxide formation of CoPt nanoparticles by the polyol process. The formation of cobalt oxide for both samples was investigated by the x-ray diffraction (XRD) method and cobalt oxide peaks are observed in the air prepared sample. Rietveld refinement analyses revealed that all samples exhibit a chemically distorted cubic crystal structure. The average particle size was determined <8 nm by scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS) was revealed the chemical compositions with possible oxygen formation in the structure. The blocking temperature is reduced to 28 K in the air prepared sample due to cobalt oxide formation. The hysteresis gap disappeared above the blocking temperature and no saturation is observed up to ±5 T external field due to the system switching from ferromagnetic state to paramagnetic state. Similarly, the coercive field was decreased from 1021 Oe to zero with increasing the temperature from 5 K to 300 K. The formations of the cobalt oxide layer did not interact with CoPt nanoparticles, therefore, the maximum exchange bias was observed about 93 Oe at 5 K. © 2020, Adiyaman University. All rights reserved.
dc.description.sponsorshipCukurova; Çukurova Üniversitesi, CU, (FBA-2018-10412)
dc.identifier.doi10.37094/adyujsci.709426
dc.identifier.endpage363
dc.identifier.issn2147-1630
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85159795714
dc.identifier.scopusqualityQ3
dc.identifier.startpage353
dc.identifier.trdizinid469867
dc.identifier.urihttps://doi.org/10.37094/adyujsci.709426
dc.identifier.urihttps://search.trdizin.gov.tr/tr/yayin/detay/469867
dc.identifier.urihttps://hdl.handle.net/20.500.14669/1605
dc.identifier.volume10
dc.indekslendigikaynakScopus
dc.indekslendigikaynakTR-Dizin
dc.language.isoen
dc.publisherAdiyaman University
dc.relation.ispartofAdiyaman University Journal of Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241211
dc.subjectCobalt oxide formation
dc.subjectCoPt NPs
dc.subjectPolyol
dc.subjectPPMS
dc.subjectSEM
dc.subjectXRD
dc.titleComparing Different Approaches to Form Cobalt Oxide Layer on CoPt Nanoparticles
dc.title.alternativeCoPt Nanoparçacıkların Üzerine Kobalt Oksit Tabakası Oluşturmada Farklı Yaklaşımların Karşılaştırılması
dc.typeArticle

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