dc.contributor.author | Serga, Vera E. | |
dc.contributor.author | Maiorov, Mikhail M. | |
dc.contributor.author | Cvetkovs, Antons | |
dc.contributor.author | Krūmiņa, Aija P. | |
dc.contributor.author | Popov, Anatoli I. | |
dc.date.accessioned | 2020-12-18T09:51:24Z | |
dc.date.available | 2020-12-18T09:51:24Z | |
dc.date.issued | 2018 | |
dc.identifier.issn | 0235-7216 | |
dc.identifier.uri | https://dspace.lu.lv/dspace/handle/7/52998 | |
dc.description | We are grateful to Prof. E. Kotomin for useful discussions. The research leading to these results has received funding from the ERAF (2017) Project, while A. I. Popov thanks IMIS-2 for the funding support. | en_US |
dc.description.abstract | In the present work, possibilities of the extraction–pyrolysis method (EPM) to produce FePt nanoparticles with the face-centered tetragonal (fct) phase were studied. A mixture of fine-disperse powder of carbonyl iron and n-trioctylam-monium hexachloroplatinate [(С8Н17)3NH]2PtCl6 solution in toluene, preliminary produced by the solvent extraction method, is used as a precursor. Precursors with a different molar ratio of metals were used. The performed investigations show that as a result of pyrolysis in the air (Tpyr = 600°C, tanneal = 30 min), a FePt alloy with the fct phase is produced. Moreover, such phases as FePt3 and/or Fe3Pt with the cubic structure may be also present in the final products. The phase composition of the produced samples depends on the Fe:Pt molar ratio in the precursor. An increase of the fct phase part with the growth of the iron content from 40 to 60 mol% is observed. Also, with the Fe80%Pt20% molar ratio of the metals in the precursor, only the ordered fct phase along with a small amount of hematite and iron chloride exists in the produced sample. Magnetic measurements confirm the fct-FePt phase formation in all produced samples and evidence that the coercivity exceeds the value (3 kOe) at the 50 mol% Fe concentration in the precursor and significantly decreases with increasing the Fe concentration to 80 mol%. | en_US |
dc.description.sponsorship | ERAF; IMIS-2; Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART² | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Lietuvos Mokslu Akademijos | en_US |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/739508/EU/Centre of Advanced Material Research and Technology Transfer/CAMART² | en_US |
dc.relation.ispartofseries | Chemija;29 (2) | |
dc.rights | info:eu-repo/semantics/openAccess | en_US |
dc.subject | Research Subject Categories::NATURAL SCIENCES:Physics | en_US |
dc.subject | Extraction–pyrolysis method | en_US |
dc.subject | Fe/Pt composition | en_US |
dc.subject | FePt alloy | en_US |
dc.subject | High magnetic coercivity | en_US |
dc.title | Fabrication and characterization of magnetic FePt nanoparticles prepared by extraction–pyrolysis method | en_US |
dc.type | info:eu-repo/semantics/article | en_US |
dc.identifier.doi | 10.6001/chemija.v29i2.3713 | |