Substitution effect on the physico-chemical properties in crednerite CuMnO2 type materials

Poienar, Maria and Sfirloaga, Paula and Vlazan, Paulina: Substitution effect on the physico-chemical properties in crednerite CuMnO2 type materials. Proceedings of the International Symposium on Analytical and Environmental Problems, (22). p. 332. (2016)

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Abstract

Recently, the ABO2 delafossite-type class of materials, B being a transition element, has attracted a lot of interest. First of all in the field of transparent conducting oxides, thin films of CuAlO2 show the unusual combination of high transparency and rather high p-type semi-conductivity [1]. On the other hand, in the field of the exotic magnetic and structural properties, a good example is the CuFeO2 delafossite, a triangular lattice antiferromagnet which has been extensively studied over the last years for its multiferroïcity [2,3]. The ABO2 delafossite structure, where A=Cu and Ag, and B a transition element, belongs to the R-3m space group and is characterised by O-Cu-O dumbells linking layers of edge sharing BO6 octahedra. However, in this class of materials,crednerite CuMnO2occupies a unique placedue to the Jahn-Teller (JT) distortion of the Mn3+ (t2g 3 eg) which leads to a monoclinic structure (C2/m space group at room temperature) and to a different topology of the magnetic triangular lattice and out-of-plane stacking sequence compared to delafossite structure. In this work, we investigated the physico-chemical properties of CuMn1-XBXO2 (B=Al, Mg; x=0 - 0.08) type materials by X-Ray diffraction, SEM-EDAX, thermal analysis, UV-VIS and infrared spectroscopy. The effect of the substitution on the lattice parameter in CuMnO2is significant in order to understand the correlation between the structure and the properties in this compound.The crednerite nanoparticles were synthesized at low temperature by hydrothermal method in teflonlined steel autoclave.

Item Type: Article
Journal or Publication Title: Proceedings of the International Symposium on Analytical and Environmental Problems
Date: 2016
Volume: 22
Page Range: p. 332
ISBN: 978-963-306-507-5
Uncontrolled Keywords: Kémia - előadáskivonat
Additional Information: Bibliogr.: 332. p. ; összefoglalás angol nyelven
Date Deposited: 2018. Dec. 12. 16:12
Last Modified: 2018. Dec. 12. 16:12
URI: http://acta.bibl.u-szeged.hu/id/eprint/56110

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