Surface Modification and Enhancement of Ferromagnetism in BiFeO3 Nanofilms Deposited on HOPG

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dc.contributor.authorRamazanov, Shihgasancs
dc.contributor.authorSobola, Dinaracs
dc.contributor.authorOrudzhev, Faridcs
dc.contributor.authorKnápek, Alexandrcs
dc.contributor.authorPolčák, Josefcs
dc.contributor.authorPotoček, Michalcs
dc.contributor.authorKaspar, Pavelcs
dc.contributor.authorDallaev, Rashidcs
dc.coverage.issue10cs
dc.coverage.volume10cs
dc.date.issued2020-10-09cs
dc.description.abstractBiFeO3 (BFO) films on highly oriented pyrolytic graphite (HOPG) substrate were obtained by the atomic layer deposition (ALD) method. The oxidation of HOPG leads to the formation of bubble regions creating defective regions with active centers. Chemisorption occurs at these active sites in ALD. Additionally, carbon interacts with ozone and releases carbon oxides (CO, CO2). Further annealing during the in situ XPS process up to a temperature of 923 K showed a redox reaction and the formation of oxygen vacancies (Vo) in the BFO crystal lattice. Bubble delamination creates flakes of BiFeO3-x/rGO heterostructures. Magnetic measurements (M–H) showed ferromagnetism (FM) at room temperature Ms ~ 120 emu/cm3. The contribution to magnetization is influenced by the factor of charge redistribution on Vo causing the distortion of the lattice as well as by the superstructure formed at the boundary of two phases, which causes strong hybridization due to the superexchange interaction of the BFO film with the FM sublattice of the interface region. The development of a method for obtaining multiferroic structures with high FM values (at room temperature) is promising for magnetically controlled applications.en
dc.formattextcs
dc.format.extent1990-1-1990-17cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationNanomaterials. 2020, vol. 10, issue 10, p. 1990-1-1990-17.en
dc.identifier.doi10.3390/nano10101990cs
dc.identifier.issn2079-4991cs
dc.identifier.orcid0000-0002-0008-5265cs
dc.identifier.orcid0000-0003-0752-8214cs
dc.identifier.orcid0000-0002-6571-6291cs
dc.identifier.orcid0000-0003-2359-9346cs
dc.identifier.orcid0000-0003-1757-2382cs
dc.identifier.orcid0000-0002-6823-5725cs
dc.identifier.other165548cs
dc.identifier.researcheridG-1175-2019cs
dc.identifier.researcheridE-6640-2013cs
dc.identifier.researcheridD-8130-2012cs
dc.identifier.researcheridH-1293-2014cs
dc.identifier.researcheridAAE-8648-2020cs
dc.identifier.scopus57189064262cs
dc.identifier.scopus36544102200cs
dc.identifier.scopus25632811000cs
dc.identifier.scopus56516508200cs
dc.identifier.scopus57201461813cs
dc.identifier.urihttp://hdl.handle.net/11012/195589
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofNanomaterialscs
dc.relation.urihttps://www.mdpi.com/2079-4991/10/10/1990cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2079-4991/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectBiFeO3en
dc.subjectatomic layer depositionen
dc.subjectperovskite structureen
dc.subjectgraphite surfaceen
dc.subjectferromagnetic propertiesen
dc.subjectBiFeO3
dc.subjectdepozice atomové vrstvy
dc.subjectperovskitové struktury
dc.subjectgrafitový povrch
dc.subjectferomagnetické vlastnosti
dc.titleSurface Modification and Enhancement of Ferromagnetism in BiFeO3 Nanofilms Deposited on HOPGen
dc.title.alternativeModifikace povrchu a posílení feromagnetismu BiFeO3 nanovrstev nanesených na HOPGcs
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-165548en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:40:24en
sync.item.modts2025.01.17 18:35:19en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav fyzikálního inženýrstvícs
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav fyzikycs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Příprava a charakterizace nanostrukturcs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé instrumentace a metody pro charakterizace materiálůcs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Sdílená laboratoř RP1cs
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Ústav fyziky
Pokročilé instrumentace a metody pro charakterizace materiálů
Příprava a charakterizace nanostruktur
Sdílená laboratoř RP1
Ústav fyzikálního inženýrství