Surface Modification and Enhancement of Ferromagnetism in BiFeO3 Nanofilms Deposited on HOPG
dc.contributor.author | Ramazanov, Shihgasan | cs |
dc.contributor.author | Sobola, Dinara | cs |
dc.contributor.author | Orudzhev, Farid | cs |
dc.contributor.author | Knápek, Alexandr | cs |
dc.contributor.author | Polčák, Josef | cs |
dc.contributor.author | Potoček, Michal | cs |
dc.contributor.author | Kaspar, Pavel | cs |
dc.contributor.author | Dallaev, Rashid | cs |
dc.coverage.issue | 10 | cs |
dc.coverage.volume | 10 | cs |
dc.date.accessioned | 2020-11-03T11:56:21Z | |
dc.date.available | 2020-11-03T11:56:21Z | |
dc.date.issued | 2020-10-09 | cs |
dc.description.abstract | BiFeO3 (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.format | text | cs |
dc.format.extent | 1990-1-1990-17 | cs |
dc.format.mimetype | application/pdf | cs |
dc.identifier.citation | Nanomaterials. 2020, vol. 10, issue 10, p. 1990-1-1990-17. | en |
dc.identifier.doi | 10.3390/nano10101990 | cs |
dc.identifier.issn | 2079-4991 | cs |
dc.identifier.other | 165548 | cs |
dc.identifier.uri | http://hdl.handle.net/11012/195589 | |
dc.language.iso | en | cs |
dc.publisher | MDPI | cs |
dc.relation.ispartof | Nanomaterials | cs |
dc.relation.uri | https://www.mdpi.com/2079-4991/10/10/1990 | cs |
dc.rights | Creative Commons Attribution 4.0 International | cs |
dc.rights.access | openAccess | cs |
dc.rights.sherpa | http://www.sherpa.ac.uk/romeo/issn/2079-4991/ | cs |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | cs |
dc.subject | BiFeO3 | en |
dc.subject | atomic layer deposition | en |
dc.subject | perovskite structure | en |
dc.subject | graphite surface | en |
dc.subject | ferromagnetic properties | en |
dc.subject | BiFeO3 | |
dc.subject | depozice atomové vrstvy | |
dc.subject | perovskitové struktury | |
dc.subject | grafitový povrch | |
dc.subject | feromagnetické vlastnosti | |
dc.title | Surface Modification and Enhancement of Ferromagnetism in BiFeO3 Nanofilms Deposited on HOPG | en |
dc.title.alternative | Modifikace povrchu a posílení feromagnetismu BiFeO3 nanovrstev nanesených na HOPG | cs |
dc.type.driver | article | en |
dc.type.status | Peer-reviewed | en |
dc.type.version | publishedVersion | en |
sync.item.dbid | VAV-165548 | en |
sync.item.dbtype | VAV | en |
sync.item.insts | 2020.11.24 12:54:48 | en |
sync.item.modts | 2020.11.24 12:14:17 | en |
thesis.grantor | Vysoké učení technické v Brně. Středoevropský technologický institut VUT. Sdílená laboratoř RP1 | cs |
thesis.grantor | Vysoké učení technické v Brně. Středoevropský technologický institut VUT. Příprava a charakterizace nanostruktur | cs |
thesis.grantor | Vysoké učení technické v Brně. Středoevropský technologický institut VUT. Charakterizace materiálů a pokročilé povlaky 1-06 | cs |
thesis.grantor | Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav fyziky | cs |
thesis.grantor | Vysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav fyzikálního inženýrství | cs |
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