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Pregled bibliografske jedinice broj: 867373

Zbornik radova

Autori: Djerd, Igor; Marković, Berislav; Popović, Jasminka; Tobias, Weller; Zvonko, Jagličić; Skoko, Željko; Pajić, Damir; Christian, Suchomski; Pascal, Voepel; Roland, Marschall; Bernd, Smarsley Smarsly
Naslov: Aqueous sol-gel route toward selected quaternary metal oxides with single and double perovskite-type structure containing tellurium
Izvornik: Book of Asbstract YUCOMAT 2016
Skup: YUCOMAT 2016
Mjesto i datum: Herceh Novi, 05.-10.09.2016.-10.09.2016
Ključne riječi: tellurates, multiferroics
Sažetak:
Highly crystalline SrFe2/3Te1/3O3, Ba3Fe2TeO9 and Ba2NiTeO6 have been synthesized by using a specially developed sol-gel route methodology, reducing the time needed using solid-state routes and resulting in high reaction yield up to 75 %. These materials have been studied by X-ray powder diffraction (XRPD), scanning and transmission electron microscopy, Raman spectroscopy, dielectric and magnetic measurements. At room temperature, the crystal structure of SrFe2/3Te1/3O3 is cubic, space group Pm-3m, with a = 3.9373(2) Å, whereas Ba3Fe2TeO9 crystallizes in the hexagonal crystal system, space group P63/mmc, a = 5.7691(4) Å and c = 14.208(1) Å. The third studied perovskite Ba2NiTeO6 crystallizes in trigonal R-3m space group with a = 5.7974(4) Å and c = 28.599(2) Å. Based on structural characterization results, the obtained single and double perovskite crystallites are nearly in nanometer regime, ranging from 45 to 164 nm, building micrometer sized particles with visible well-faceted hexagonal morphology. Magnetic measurements show the onset of ferromagnetic ordering at relatively high temperature of 667 K for the SrFe2/3Te1/3O3, whereas Ba3Fe2TeO9 and Ba2NiTeO6 show anti- ferromagnetic ordering below 80 and 8.6 K, respectively. The measured room temperature dielectric constants are in the range between 15 and 77.
Vrsta sudjelovanja: Poster
Vrsta prezentacije u zborniku: Sažetak
Vrsta recenzije: Međunarodna recenzija
Izvorni jezik: ENG
Kategorija: Stručni
Znanstvena područja:
Javno zdravstvo i zdravstvena zaštita
Upisao u CROSBI: Jasminka Popović (Jasminka.Popovic@irb.hr), 25. Ožu. 2017. u 17:53 sati



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