Cation distribution and optical properties of Cr-doped MgGa2O4 nanocrystals

被引：14
作者：
Duan, Xiulan [1 ]
Liu, Jian [1 ]
Wang, Xinqiang [1 ]
Jiang, Huaidong [1 ]
机构：
[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
来源：
OPTICAL MATERIALS | 2014年 / 37卷
基金：
中国国家自然科学基金;
关键词：
MgGa2O4; spinel; Cation distribution; X-ray photoelectron spectroscopy; Optical properties; MAGNESIUM GALLATE; SPECTROSCOPY; SPINELS; IONS; ABSORPTION; STATE; NMR; XPS; MOSSBAUER; OXIDATION;
D O I：
10.1016/j.optmat.2014.09.029
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The distribution of cations in the spinel-type MgCr2yGa2-2yO4 (y = 0-0.6) nanocrystals and their optical properties as a function of annealing temperature and chromium content were investigated by using X-ray photoelectron spectroscopy (XPS) in combination with absorption spectroscopy. The cations in MgCr2yGa2-2yO4 nanocrystals are disorderly distributed with mixing of divalent and trivalent cations occupying the tetrahedral and octahedral sites. With the increase of annealing temperature, the inversion parameter (the fraction of Mg2+ ions in octahedral sites) decreases, which has the same varying tendency with the proportion of tetrahedral Ga3+ or Cr3+ ions. The inversion parameter increases with increasing Cr3+ concentration. The absorption spectra indicate that Cr3+ ions are located in the octahedral sites as well as in the tetrahedral sites. The fraction of tetrahedral Cr3+ decreases with Cr-enrichment. The optical absorption properties of Cr-doped MgGa2O4 nanocrystals may be tuned by varying the preparation temperature or Cr concentration. 2014 (C) Elsevier B.V. All rights reserved.
引用
收藏
页码：854 / 861
页数：8
相关论文
共 32 条
  • [1] AreaAn K.C.O., 1985, PHYS STATUS SOLIDI A, V92, P443
  • [2] Surface characterisation of spinels with Ti(IV) distributed in tetrahedral and octahedral sites
    Arillo, MA
    López, ML
    Pico, C
    Veiga, ML
    Jiménez-López, A
    Rodríguez-Castellón, E
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2001, 317 : 160 - 163
  • [3] Red persistent luminescence in MgGa2O4 : Cr3+; a new phosphor for in vivo imaging
    Basavaraju, N.
    Sharma, S.
    Bessiere, A.
    Viana, B.
    Gourier, D.
    Priolkar, K. R.
    [J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2013, 46 (37)
  • [4] AN XPS AND MOSSBAUER STUDY OF THE ELECTRONIC-PROPERTIES OF ZNCRXGA2-XO4 SPINEL SOLID-SOLUTIONS
    BATTISTONI, C
    DORMANN, JL
    FIORANI, D
    PAPARAZZO, E
    VITICOLI, S
    [J]. SOLID STATE COMMUNICATIONS, 1981, 39 (04) : 581 - 585
  • [5] XPS investigation of Mn valence in lanthanum manganite thin films under variation of oxygen content
    Beyreuther, E
    Grafström, S
    Eng, LM
    Thiele, C
    Dörr, K
    [J]. PHYSICAL REVIEW B, 2006, 73 (15)
  • [6] CORRELATIONS BETWEEN X-RAY PHOTOELECTRON-SPECTROSCOPY DATA AND CATALYTIC PROPERTIES IN SELECTIVE OXIDATION ON SB-SN-O CATALYSTS
    BOUDEVILLE, Y
    FIGUERAS, F
    FORISSIER, M
    PORTEFAIX, JL
    VEDRINE, JC
    [J]. JOURNAL OF CATALYSIS, 1979, 58 (01) : 52 - 60
  • [7] An investigation on structure and texture of silica-magnesia xerogels
    Brambilla, Rodrigo
    Radtke, Claudio
    Dos Santos, Joao H. Z.
    Miranda, Marcia S. L.
    [J]. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2009, 51 (01) : 70 - 77
  • [8] Briggs D., 1983, Practical Surface Analysis: by Auger and X-ray Photoelectron Spectroscopy
  • [9] CRYSTAL DATA FOR THE SPINELS MGGA2O4, MNGA2O4
    CASADO, PG
    RASINES, I
    [J]. ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 1982, 160 (1-2): : 33 - 37
  • [10] Site occupancies of Co-Mg-Cr-Fe ions and their impact on the properties of Co0.5Mg0.5CrxFe2-xO4
    Chaudhari, M. V.
    Shirsath, Sagar E.
    Kadam, A. B.
    Kadam, R. H.
    Shelke, S. B.
    Mane, D. R.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2013, 552 : 443 - 450
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