Naslov
Aqueous sol-gel route toward selected quaternary metal oxides with single and double perovskite-type structure containing tellurium //

Autori
Đerđ, Igor ; Marković, Berislav ; Popović, Jasminka ; Tobias, Weller ; Zvonko, Jagličić ; Skoko, Željko ; Pajić, Damir ; Christian, Suchomski ; Pascal, Voepel ; Roland, Marschall ; Bernd, Smarsly

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts 23rd Conference of the Serbian Crystallographic Society. / - , 2016, 15-15

Skup
23rd Conference of the Serbian Crystallographic Society

Mjesto i datum
Andrevlje, Srbija, 08.06.2016. - 12.06.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

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 tem- perature, 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, build- ing micrometer sized particles with visible well-faceted hexagonal morphology. Magnetic measurements show the onset of ferrimagnetic ordering at relatively high temperature of 667 K for the SrFe2/3Te1/3O3, whereas Ba3Fe2TeO9 and Ba2NiTeO6 show antiferromag- netic ordering below 80 and 8.6 K, respectively. The measured room temperature dielec- tric constants are in the range between 15 and 77. [1]

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

POVEZANOST RADA