Access the full text.
Sign up today, get DeepDyve free for 14 days.
Loading next page...
/lp/wiley/raman-and-photoluminescence-spectroscopic-studies-on-structural-dJofvke9AZ
References (25)
-
A. Kuznetsov, O. Churkin, A. Ivanov, V. Popov, P. Alekseev, A. Menushenkov (2020)
Magnetic susceptibility of pyrochlores R2Ti2O7: R = Gd, Dy, TbJournal of Magnetism and Magnetic Materials, 500
-
Ž. Antić, K. Prashanthi, S. Ćulubrk, K. Vuković, M. Dramićanin, T. Thundat (2016)
Effect of annealing conditions on structural and luminescencent properties of Eu3+-doped Gd2Ti2O7 thin filmsApplied Surface Science, 364
-
Arpino K. E. (2017)
10.1103/PhysRevB.95.094407Phys. Rev. B, 95
-
Ma̧czka M. (2009)
10.1103/PhysRevB.79.214437Phys. Rev. B: Condens. Matter Mater. Phys., 79
-
Shannon R. D. (1976)
10.1107/S0567739476001551Acta Crystallogr., Sect. A: Found. Crystallogr., 32
-
D. West, T. McQueen, Q. Huang, R. Cava (2008)
Structural and magnetic properties of pyrochlore solid solutions (Y,Lu)2Ti2-x(Nb,Ta)xO7±yJournal of Solid State Chemistry, 181
-
Zhang Y. (2009)
10.1016/S1002-0721(08)60359-2J. Rare Earths, 27
-
Sanjuán M. L. (2011)
10.1103/PhysRevB.84.104207Phys. Rev. B: Condens. Matter Mater. Phys., 84
-
Saha S. (2008)
10.1103/PhysRevB.78.214102Phys. Rev. B: Condens. Matter Mater. Phys., 78
-
S. Ćulubrk, Ž. Antić, V. Lojpur, M. Marinović‐Cincović, M. Dramićanin (2015)
Sol-Gel derived Eu 3+ -doped Gd 2 Ti 2 O 7 pyrochlore nanopowdersJournal of Nanomaterials, 16
-
G. Sala, M. Gutmann, D. Prabhakaran, D. Pomaranski, C. Mitchelitis, J. Kycia, D. Porter, C. Castelnovo, J. Goff (2014)
Vacancy defects and monopole dynamics in oxygen-deficient pyrochlores.Nature materials, 13 5
-
R. Jacko, M. Mihálik, M. Zentková, P. Roupcová (2020)
Crystal growth and characterization of (DyxLa1–x)2Ti2O7 crystalsMetallic Materials, 58
-
F.A. Jusoh, K. Tan, Z. Zainal, S. Chen, C. Khaw, O. Lee (2020)
Investigation of structural and dielectric properties of subsolidus bismuth iron niobate pyrochloresJournal of Asian Ceramic Societies, 8
-
J. Farmer, L. Boatner, B. Chakoumakos, M. Du, M. Lance, C. Rawn, J. Bryan (2014)
Structural and crystal chemical properties of rare-earth titanate pyrochloresJournal of Alloys and Compounds, 605
-
P. Tan, K. Tan, C. Khaw, Z. Zainal, S. Chen, M. Chon (2012)
Structural and electrical properties of bismuth magnesium tantalate pyrochloresCeramics International, 38
-
Chitrarasu Kaliyaperumal, Amirthapandian Sankarakumar, Jegadeesan Palanisamy, T. Paramasivam (2018)
Fluorite to pyrochlore phase transformation in nanocrystalline Nd2Zr2O7Materials Letters
-
M. Suganya, K. Ganesan, P. Vijayakumar, Amirdha Gill, R. Ramaseshan, S. Ganesamoorthy (2020)
Structural, optical and mechanical properties of Y2Ti2O7 single crystalScripta Materialia, 187
-
M. Subramanian, G. Aravamùdan, G. Rao (1983)
Oxide pyrochlores — A reviewProgress in Solid State Chemistry, 15
-
Y. Li, Y. Wang, M. Zhou, C. Xu, J. Valdez, K. Sickafus (2011)
Light ion irradiation effects on stuffed Lu2(Ti2−xLux)O7−x/2 (x = 0, 0.4 and 0.67) structuresNuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms, 269
-
Carbonio R. E. (1999)
10.1088/0953-8984/11/2/004J. Phys.: Condens. Matter, 11
-
V. Popov, A. Menushenkov, A. Ivanov, B. Gaynanov, A. Yastrebtsev, F. d’Acapito, A. Puri, G. Castro, I. Shchetinin, M. Zheleznyi, Y. Zubavichus, K. Ponkratov (2019)
Comparative analysis of long- and short-range structures features in titanates Ln2Ti2O7 and zirconates Ln2Zr2O7 (Ln = Gd, Tb, Dy) upon the crystallization processJournal of Physics and Chemistry of Solids
-
R. Sachan, V. Cooper, B. Liu, D. Aidhy, B. Voas, M. Lang, X. Ou, C. Trautmann, Yanwen Zhang, M. Chisholm, W. Weber (2017)
Forging Fast Ion Conducting Nanochannels with Swift Heavy Ions: The Correlated Role of Local Electronic and Atomic StructureJournal of Physical Chemistry C, 121
-
J. Kang, Zhenxing Fang, Xiang Chen, Wei Liu, F. Guo, Shuting Wu, Yongfan Zhang, Jianzhong Chen (2014)
Effect of oxygen vacancy concentration on the absorption spectra of Dy2Ti2O7 crystalJournal of Alloys and Compounds, 599
-
Giles Blundred, C. Bridges, M. Rosseinsky (2004)
New oxidation states and defect chemistry in the pyrochlore structure.Angewandte Chemie, 43 27
-
P. Tanner (2013)
Some misconceptions concerning the electronic spectra of tri-positive europium and cerium.Chemical Society reviews, 42 12
- Publisher
- Wiley
- Copyright
- © 2022 Wiley‐VCH GmbH
- eISSN
- 1521-4079
- DOI
- 10.1002/crat.202100287
- Publisher site
- See Article on Publisher Site
Abstract
Raman and photoluminescence spectroscopic studies on oxygen vacancy‐induced structural disorder in Gd2Ti2O7‐δ single crystals grown by optical floating zone technique under argon atmosphere are reported. The oxygen vacancies in Gd2Ti2O7‐δ wafers decrease with thermal annealing in air atmosphere. The full width at half maximum of X‐ray diffraction rocking curve decreases from 245 to 157 arcsec and the optical transmittance increases from 23% to 87% (at 1000 nm) upon post growth thermal annealing. Raman spectroscopic studies reveal a monotonic increase in intensity of O–Gd–O (Eg) and Ti–O (A1g) stretching modes with thermal annealing. Since these modes are associated with modulation of oxygen x parameter which is sensitive to Ti–O octahedron distortion, the increase in Raman intensity indicates an improvement in structural ordering of oxygen sub‐lattice in Gd2Ti2O7‐δ. Moreover, the photoluminescence studies also corroborate the Raman analysis in terms of reduction of structural defects associated with oxygen vacancies as a function of thermal annealing. This study demonstrates the effectiveness of using Raman spectroscopy to probe the structural disorder in Gd2Ti2O7‐δ crystals.
Journal
Crystal Research & Technology – Wiley
Published: Apr 1, 2022
Keywords: pyrochlore oxide; thermal annealing; X‐ray techniques; structural disorder; photoluminescence