An interpretation of the optical properties of Cr4+-activated pyrochlores, Y2Ti2O7 and Y2Sn2O7

被引：23
|
作者：
Srivastava, A. M. [1 ]
机构：
[1] GE Global Res, Niskayuna, NY 12309 USA
来源：
JOURNAL OF LUMINESCENCE | 2009年 / 129卷 / 09期
关键词：
Pyrochlore; Cr4+; Crystal field splitting; Covalence; Ligand polarization; TETRAHEDRALLY COORDINATED CR4+; THEORETICAL CALCULATION; ABSORPTION-SPECTRUM; CRYSTAL; OXIDES;
D O I：
10.1016/j.jlumin.2009.04.015
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A qualitative model is proposed to explain the differences between the optical properties of the six-coordinated Cr4+ ion in the pyrochlores, Y2Sn2O7 and Y2Ti2O7, It is shown that polarization of the electron density of the oxygen ions occupying the 48f sites of the pyrochlore lattice is responsible for the observed differences in the optical properties. (C) 2009 Published by Elsevier B.V.
引用
收藏
页码：1000 / 1002
页数：3
相关论文
共 50 条
  • [1] Crystal structural and optical properties of Cr-doped Y2Ti2O7 and Y2Sn2O7 pyrochlores
    Matteucci, F.
    Cruciani, G.
    Dondi, M.
    Baldi, G.
    Barzanti, A.
    ACTA MATERIALIA, 2007, 55 (07) : 2229 - 2238
  • [2] Theoretical investigation of optical spectra and covalent effect of Cr4+ in Y2Ti2O7 and Y2Sn2O7
    Feng, Wen-Lin
    Xue, Ji-Yuan
    PHYSICA B-CONDENSED MATTER, 2012, 407 (12) : 2344 - 2346
  • [3] Comparative analysis of crystal field effects and optical spectroscopy of six-coordinated Mn4+ ion in the Y2Ti2O7 and Y2Sn2O7 pyrochlores
    Brik, M. G.
    Srivastava, A. M.
    Avram, N. M.
    OPTICAL MATERIALS, 2011, 33 (11) : 1671 - 1676
  • [4] Thermal properties of the pyrochlore, Y2Ti2O7
    Johnson, Michel B.
    James, David D.
    Bourque, Alex
    Dabkowska, Hanna A.
    Gaulin, Bruce D.
    White, Mary Anne
    JOURNAL OF SOLID STATE CHEMISTRY, 2009, 182 (04) : 725 - 729
  • [5] Ionic conductivity, structural and thermal properties of Ca2+ doped Y2Ti2O7 pyrochlores for SOFC
    Gill, Jasmeet Kaur
    Pandey, O. P.
    Singh, K.
    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2012, 37 (04) : 3857 - 3864
  • [6] Modifications of structural and physical properties induced by swift heavy ions in Gd2Ti2O7 and Y2Ti2O7 pyrochlores
    Sellami, N.
    Sattonnay, G.
    Grygiel, C.
    Monnet, I.
    Debelle, A.
    Legros, C.
    Menut, D.
    Miro, S.
    Simon, P.
    Bechade, J. L.
    Thome, L.
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2015, 365 : 371 - 375
  • [7] Optical Observation of Striations in Y2Ti2O7 Single Crystals
    Liu, Changyou
    Dabkowski, Antoni
    Jie, Wanqi
    Gaulin, Bruce D.
    Dabkowska, Hanna A.
    CRYSTALS, 2019, 9 (05):
  • [8] Investigations of crystal-field energy levels and microscopic spin-Hamiltonian parameters of Mn4+ ions in pyrochlore hosts Y2Ti2O7 and Y2Sn2O7
    Swarnakar, Debasish
    Jana, Yatramohan
    JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2020, 53 (25)
  • [9] Surface Ferromagnetism in Y2Sn2O7 Pyrochlore Nanoparticles
    Borah, Kulendra
    Longchar, Lanuakum A.
    Babu, P. D.
    Jayaramulu, Kolleboyina
    Sundarayya, Y.
    JOURNAL OF ALLOYS AND COMPOUNDS, 2024, 1008
  • [10] High-pressure synchrotron X-ray diffraction study of the pyrochlores: Ho2Ti2O7, Y2Ti2O7 and Tb2Ti2O7
    Scott, Paul R.
    Midgley, A.
    Musaev, O.
    Muthu, D. V. S.
    Singh, S.
    Suryanarayanan, R.
    Revcolevschi, A.
    Sood, A. K.
    Kruger, M. B.
    HIGH PRESSURE RESEARCH, 2011, 31 (01) : 219 - 227
12345