TY  - JOUR
AU  - Milošević, Olivera
AU  - Luković Golić, Danijela
AU  - Počuča-Nešić, Milica
AU  - Dapčević, Aleksandra
AU  - Šenjug, Pavla
AU  - Pajić, Damir
AU  - Radošević, Tina
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2022
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1750
AB  - Yttrium manganite, YMnO3, was doped with different concentrations of titanium (x = 0, 0.04, 0.08, 0.10, 0.15, 0.20) in order to improve the microstructural and multiferroic properties. The powders were prepared using sol-gel polymerization complex method from citrate precursors. Depending on the titanium concentration, the hexagonal structure and/or the rhombohedral superstructure are present in the sintered samples. The YMn1–xTixO3+δ (x = 0.10, 0.15, 0.20) ceramic samples showed significantly reduced density of microcracks, and of inter- and intragranular pores, and relative densities greater than 90 %. The structural parameters for YMn1–xTixO3+δ (x = 0, 0.10, 0.15) were correlated with the results of magnetic and ferroelectric measurements. The most of titanium-doped samples showed a reduction of the leakage current density in comparison with undoped YMnO3, and their ferroelectric responses were slightly improved. The modifications in structural arrangement resulted in partial suppression of ideal antiferromagnetic ordering visible through decrease of the Néel temperature and Weiss parameter, as well as the appearance of weak ferromagnetism and increase of magnetization (especially, in samples x = 0.08, 0.10, 0.15). These changes in physical quantities most likely originated from incorporation of the uncompensated magnetic moments and possible spin canting induced by enhanced symmetry break of the superexchange bridges.
PB  - Springer
T2  - Journal of Sol-Gel Science and Technology
T1  - Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties
EP  - 819
IS  - 3
SP  - 807
VL  - 103
DO  - 10.1007/s10971-022-05872-3
ER  - 

@article{
author = "Milošević, Olivera and Luković Golić, Danijela and Počuča-Nešić, Milica and Dapčević, Aleksandra and Šenjug, Pavla and Pajić, Damir and Radošević, Tina and Branković, Goran and Branković, Zorica",
year = "2022",
abstract = "Yttrium manganite, YMnO3, was doped with different concentrations of titanium (x = 0, 0.04, 0.08, 0.10, 0.15, 0.20) in order to improve the microstructural and multiferroic properties. The powders were prepared using sol-gel polymerization complex method from citrate precursors. Depending on the titanium concentration, the hexagonal structure and/or the rhombohedral superstructure are present in the sintered samples. The YMn1–xTixO3+δ (x = 0.10, 0.15, 0.20) ceramic samples showed significantly reduced density of microcracks, and of inter- and intragranular pores, and relative densities greater than 90 %. The structural parameters for YMn1–xTixO3+δ (x = 0, 0.10, 0.15) were correlated with the results of magnetic and ferroelectric measurements. The most of titanium-doped samples showed a reduction of the leakage current density in comparison with undoped YMnO3, and their ferroelectric responses were slightly improved. The modifications in structural arrangement resulted in partial suppression of ideal antiferromagnetic ordering visible through decrease of the Néel temperature and Weiss parameter, as well as the appearance of weak ferromagnetism and increase of magnetization (especially, in samples x = 0.08, 0.10, 0.15). These changes in physical quantities most likely originated from incorporation of the uncompensated magnetic moments and possible spin canting induced by enhanced symmetry break of the superexchange bridges.",
publisher = "Springer",
journal = "Journal of Sol-Gel Science and Technology",
title = "Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties",
pages = "819-807",
number = "3",
volume = "103",
doi = "10.1007/s10971-022-05872-3"
}

Milošević, O., Luković Golić, D., Počuča-Nešić, M., Dapčević, A., Šenjug, P., Pajić, D., Radošević, T., Branković, G.,& Branković, Z.. (2022). Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties. in Journal of Sol-Gel Science and Technology
Springer., 103(3), 807-819.
https://doi.org/10.1007/s10971-022-05872-3

Milošević O, Luković Golić D, Počuča-Nešić M, Dapčević A, Šenjug P, Pajić D, Radošević T, Branković G, Branković Z. Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties. in Journal of Sol-Gel Science and Technology. 2022;103(3):807-819.
doi:10.1007/s10971-022-05872-3 .

Milošević, Olivera, Luković Golić, Danijela, Počuča-Nešić, Milica, Dapčević, Aleksandra, Šenjug, Pavla, Pajić, Damir, Radošević, Tina, Branković, Goran, Branković, Zorica, "Titanium doped yttrium manganite: improvement of microstructural properties and peculiarities of multiferroic properties" in Journal of Sol-Gel Science and Technology, 103, no. 3 (2022):807-819,
https://doi.org/10.1007/s10971-022-05872-3 . .

TY  - CONF
AU  - Ribić, Vesna
AU  - Rečnik, Aleksander
AU  - Dražić, Goran
AU  - Komelj, Matej
AU  - kokalj, Anton
AU  - Podlogar, Matejka
AU  - Daneu, Nina
AU  - Bernik, Slavko
AU  - Radošević, Tina
AU  - Luković Golić, Danijela
AU  - Branković, Zorica
AU  - Branković, Goran
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2463
AB  - Various dopants are known to produce inversion boundaries (IBs) in ZnO, causing polarity inversion across the interface. These are found either in basal or pyramidal planes and can be of head-to-head or tail-to-tail configuration with respect to the orientation of the polar c-axis. The dopants, known to produce IBs in ZnO are: In2O3, Fe2O3, Mn2O3, Ga2O3, SiO2, SnO2, TiO2 and Sb2O3. While some of IBs have been studied in detail, many IB structures remain unresolved. In our study we investigated structure and chemistry of basal plane inversion boundaries in SnO2-doped ZnO. The formation of IBs in this system was first reported by Daneu et al. (2000)1 and using high-resolution transmission electron microscopy the same group attempted to solve structure and chemistry of Sn-rich IBs.2 Implementing an innovative analytical approach based on acquiring multiple EDS spectra with concentric electron probes they showed that Sn4+ ions do not occupy the full IB layer, but rather one half of the layer. This suggested an average oxidation state of III+ for the cations comprising the IB plane. Based on electron micro-diffraction and HRTEM study Daneu et al.1,2 reported that Sn-rich IBs are head-to-head oriented with interfacial cations located in trigonal prismatic sites, however, the exact atomic arrangement of Sn along IB has not been determined. To identify the translation state and atomic arrangement on Sn-rich IBs in ZnO we performed quantitative HRTEM and HAADF-STEM analysis of SnO2-doped ZnO/Bi2O3 ceramics. IBs in ZnO grains were observed for two low-index orientations, [100] and [120], to obtain a 3D information on the translation state of the IB plane. The coordination site of interfacial cations was shown to be octahedral.
472
Translation obtained from images is compared with three different, so far known, types of the head-to-head IB translations with octahedral coordination of cations at IB-plane: (i) IB with stacking of the cation sublattice, as observed with Sb doping, (ii) IB with, as observed with In and Fe doping and (iii) IB with as observed with Mn doping. For Sn-doped ZnO translations turned out to be (ii) , the same as the one occurring in In- and Fe-doped ZnO. Based on experimental observations of local atomic arrangement, HRTEM and HAADF-STEM image simulations were performed for two different in-plane distributions of Sn and Zn atoms, to better understand experimental image contrast on IBs. The generated models will be further used for ab-initio calculations aimed at determining the electronic structure of IBs.
PB  - Ruđer Bošković Institute and Croatian Microscopy Society, Rovinj (Croatia)
C3  - 13th Multinational Congress on Microscopy, Rovinj, Croatia, 2017
T1  - TEM study of basal-plane inversion boundaries in Sn‐Doped ZnO
SP  - 471
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2463
ER  - 

@conference{
author = "Ribić, Vesna and Rečnik, Aleksander and Dražić, Goran and Komelj, Matej and kokalj, Anton and Podlogar, Matejka and Daneu, Nina and Bernik, Slavko and Radošević, Tina and Luković Golić, Danijela and Branković, Zorica and Branković, Goran",
year = "2017",
abstract = "Various dopants are known to produce inversion boundaries (IBs) in ZnO, causing polarity inversion across the interface. These are found either in basal or pyramidal planes and can be of head-to-head or tail-to-tail configuration with respect to the orientation of the polar c-axis. The dopants, known to produce IBs in ZnO are: In2O3, Fe2O3, Mn2O3, Ga2O3, SiO2, SnO2, TiO2 and Sb2O3. While some of IBs have been studied in detail, many IB structures remain unresolved. In our study we investigated structure and chemistry of basal plane inversion boundaries in SnO2-doped ZnO. The formation of IBs in this system was first reported by Daneu et al. (2000)1 and using high-resolution transmission electron microscopy the same group attempted to solve structure and chemistry of Sn-rich IBs.2 Implementing an innovative analytical approach based on acquiring multiple EDS spectra with concentric electron probes they showed that Sn4+ ions do not occupy the full IB layer, but rather one half of the layer. This suggested an average oxidation state of III+ for the cations comprising the IB plane. Based on electron micro-diffraction and HRTEM study Daneu et al.1,2 reported that Sn-rich IBs are head-to-head oriented with interfacial cations located in trigonal prismatic sites, however, the exact atomic arrangement of Sn along IB has not been determined. To identify the translation state and atomic arrangement on Sn-rich IBs in ZnO we performed quantitative HRTEM and HAADF-STEM analysis of SnO2-doped ZnO/Bi2O3 ceramics. IBs in ZnO grains were observed for two low-index orientations, [100] and [120], to obtain a 3D information on the translation state of the IB plane. The coordination site of interfacial cations was shown to be octahedral.
472
Translation obtained from images is compared with three different, so far known, types of the head-to-head IB translations with octahedral coordination of cations at IB-plane: (i) IB with stacking of the cation sublattice, as observed with Sb doping, (ii) IB with, as observed with In and Fe doping and (iii) IB with as observed with Mn doping. For Sn-doped ZnO translations turned out to be (ii) , the same as the one occurring in In- and Fe-doped ZnO. Based on experimental observations of local atomic arrangement, HRTEM and HAADF-STEM image simulations were performed for two different in-plane distributions of Sn and Zn atoms, to better understand experimental image contrast on IBs. The generated models will be further used for ab-initio calculations aimed at determining the electronic structure of IBs.",
publisher = "Ruđer Bošković Institute and Croatian Microscopy Society, Rovinj (Croatia)",
journal = "13th Multinational Congress on Microscopy, Rovinj, Croatia, 2017",
title = "TEM study of basal-plane inversion boundaries in Sn‐Doped ZnO",
pages = "471",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2463"
}

Ribić, V., Rečnik, A., Dražić, G., Komelj, M., kokalj, A., Podlogar, M., Daneu, N., Bernik, S., Radošević, T., Luković Golić, D., Branković, Z.,& Branković, G.. (2017). TEM study of basal-plane inversion boundaries in Sn‐Doped ZnO. in 13th Multinational Congress on Microscopy, Rovinj, Croatia, 2017
Ruđer Bošković Institute and Croatian Microscopy Society, Rovinj (Croatia)., 471.
https://hdl.handle.net/21.15107/rcub_rimsi_2463

Ribić V, Rečnik A, Dražić G, Komelj M, kokalj A, Podlogar M, Daneu N, Bernik S, Radošević T, Luković Golić D, Branković Z, Branković G. TEM study of basal-plane inversion boundaries in Sn‐Doped ZnO. in 13th Multinational Congress on Microscopy, Rovinj, Croatia, 2017. 2017;:471.
https://hdl.handle.net/21.15107/rcub_rimsi_2463 .

Ribić, Vesna, Rečnik, Aleksander, Dražić, Goran, Komelj, Matej, kokalj, Anton, Podlogar, Matejka, Daneu, Nina, Bernik, Slavko, Radošević, Tina, Luković Golić, Danijela, Branković, Zorica, Branković, Goran, "TEM study of basal-plane inversion boundaries in Sn‐Doped ZnO" in 13th Multinational Congress on Microscopy, Rovinj, Croatia, 2017 (2017):471,
https://hdl.handle.net/21.15107/rcub_rimsi_2463 .