Defect model and EPR parameters for the tetragonal Yb3+ center in KTaO3 crystal

被引：9
|
作者：
Feng, Wen-Lin [1 ,2 ]
Liu, Hong-Gang [1 ]
Zheng, Wen-Chen [1 ,3 ]
机构：
[1] Sichuan Univ, Dept Mat Sci, Chengdu 610064, Peoples R China
[2] Chongqing Inst Technol, Dept Appl Phys, Chongqing 400050, Peoples R China
[3] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2008年 / 71卷 / 02期
关键词：
Electron paramagnetic resonance (EPR); Defect model; Crystal-field theory; Yb3+; KTaO3;
D O I：
10.1016/j.saa.2007.12.038
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
The defect model of the tetragonal Yb3+ (at K+ site) center in KTaO3 crystal is suggested, i.e., Yb3+ ion does not occupy the ideal K+ site, but is displaced by an amount Delta Z along one of (100) axes because of the much smaller ionic radius of Yb3+ compared with that of the replaced K+. Based on the defect model, the EPR parameters (g factors g(parallel to), g(perpendicular to) and hyperfine structure constants (171)A(parallel to), (171)A(perpendicular to), (173)A(parallel to), (173)A(perpendicular to)) are calculated by diagonalizing the 14 x 14 complete energy matrix. The calculated values are in agreement with the observed values and the off-center displacement Delta Z (approximate to 0.2 angstrom) is estimated from the calculations. These results are discussed. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：559 / 561
页数：3
相关论文
共 50 条
  • [21] PHOTOLUMINESCENCE IN KTAO3 SINGLE-CRYSTAL
    YAMAICHI, E
    WATANABE, K
    IMAMIYA, K
    OHI, K
    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1987, 56 (05) : 1890 - 1897
  • [22] Studies of the defect structure for Mn2+ in KTaO3 crystal from the calculation of EPR zero-field splitting
    Zheng Wen-Chen
    SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2007, 67 (3-4) : 694 - 696
  • [23] Specific features of the EPR spectra of KTaO3: Mn nanopowders
    I. S. Golovina
    B. D. Shanina
    I. N. Geifman
    A. A. Andriiko
    L. V. Chernenko
    Physics of the Solid State, 2012, 54 : 551 - 558
  • [24] DEFECT STRUCTURE AND ELECTRICAL-PROPERTIES OF KTAO3
    DEPUTY, GO
    VEST, RW
    JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1978, 61 (7-8) : 321 - 325
  • [25] Defect driven ferroelectricity and magnetism in nanocrystalline KTaO3
    Golovina, I. S.
    Kolesnik, S. P.
    Bryksa, V. P.
    Strelchuk, V. V.
    Yanchuk, I. B.
    Geifman, I. N.
    Khainakov, S. A.
    Svechnikov, S. V.
    Morozovska, A. N.
    PHYSICA B-CONDENSED MATTER, 2012, 407 (04) : 614 - 623
  • [26] Specific Features of the EPR Spectra of KTaO3:Mn Nanopowders
    Golovina, I. S.
    Shanina, B. D.
    Geifman, I. N.
    Andriiko, A. A.
    Chernenko, L. V.
    PHYSICS OF THE SOLID STATE, 2012, 54 (03) : 551 - 558
  • [27] OPTICAL AND EPR SPECTRA OF MN4+ IN KTAO3
    HANNON, DM
    BULLETIN OF THE AMERICAN PHYSICAL SOCIETY, 1969, 14 (03): : 412 - &
  • [28] EPR investigations of copper centers in KTaO3 single crystals
    Azamat, DV
    Azzoni, CB
    Badalyan, AG
    Baranova, PG
    Galinetto, P
    Mozzati, MC
    Trepakov, VA
    Jastrabik, L
    Rosa, J
    Kapphan, S
    FERROELECTRICS, 2001, 254 (1-4) : 77 - 82
  • [29] EPR of a non-Kramers iron ion in KTaO3
    D. V. Azamat
    S. A. Basun
    V. É. Bursian
    A. G. Razdobarin
    L. S. Sochava
    H. Hesse
    S. Kapphan
    Physics of the Solid State, 1999, 41 : 1303 - 1306
  • [30] Theoretical investigations of the EPR parameters of cubic Yb3+ center in PbS, PbSe and PbTe semiconductors
    Xie, Guo-Ya
    Liu, Xian-Rong
    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2013, 493 : 143 - 144
12345