Blue luminescence at room temperature in defective MgO films

被引：26
作者：
Martinez-Boubeta, C. [1 ,2 ]
Martinez, A. [1 ,2 ]
Hernandez, S. [1 ,2 ]
Pellegrino, P. [1 ,2 ]
Antony, A. [3 ]
Bertomeu, J. [3 ]
Balcells, Ll [4 ]
Konstantinovic, Z. [4 ]
Martinez, B. [4 ]
机构：
[1] Univ Barcelona, IN2UB, E-08028 Barcelona, Spain
[2] Univ Barcelona, Dept Elect, E-08028 Barcelona, Spain
[3] Univ Barcelona, Dept Fis Aplicada & Opt, Grp Energia Solar, E-08028 Barcelona, Spain
[4] Inst Ciencia Mat Barcelona ICMAB CSIC, Bellaterra 08193, Spain
来源：
SOLID STATE COMMUNICATIONS | 2011年 / 151卷 / 10期
关键词：
Thin films; Point defects; Electronic states; Luminescence; MAGNETIC SEMICONDUCTORS; MAGNESIUM-OXIDE; PHOTOLUMINESCENCE; IONS;
D O I：
10.1016/j.ssc.2011.03.007
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Luminescence spectroscopy has been used to characterize MgO films prepared by rf-sputtering. A clear correlation is found between the appearance of an emission peak centered at approximately 460 nm and the detection of ferromagnetic ordering in the samples. We suggest that cationic vacancies are responsible for the blue-light emission by introducing p states into the electronic band-gap. In accordance with this, our results strongly indicate that cationic vacancies are at the heart of the appearance of long-range magnetic ordering in MgO films. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：751 / 753
页数：3
相关论文
共 30 条
  • [1] Seeking room-temperature ferromagnetic semiconductors
    Ando, Koji
    [J]. SCIENCE, 2006, 312 (5782) : 1883 - 1885
  • [2] Room temperature ferromagnetism in pristine MgO thin films
    Araujo, C. Moyses
    Kapilashrami, Mukes
    Jun, Xu
    Jayakumar, O. D.
    Nagar, Sandeep
    Wu, Yan
    Arhammar, Cecilia
    Johansson, Borje
    Belova, Lyubov
    Ahuja, Rajeev
    Gehring, Gillian A.
    Rao, K. V.
    [J]. APPLIED PHYSICS LETTERS, 2010, 96 (23)
  • [3] Physicochemical and in situ photoluminescence study of the reversible transformation of oxide ions of low coordination into hydroxyl groups upon interaction of water and methanol with MgO
    Bailly, ML
    Costentin, G
    Lauron-Pernot, H
    Krafft, JM
    Che, M
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (06) : 2404 - 2413
  • [4] Aging of magnetic properties in MgO films
    Balcells, Ll.
    Beltran, J. I.
    Martinez-Boubeta, C.
    Konstantinovic, Z.
    Arbiol, J.
    Martinez, B.
    [J]. APPLIED PHYSICS LETTERS, 2010, 97 (25)
  • [5] Photon emission spectroscopy of thin MgO films with the STM: from a tip-mediated to an intrinsic emission characteristic
    Benia, H-M
    Myrach, P.
    Nilius, N.
    [J]. NEW JOURNAL OF PHYSICS, 2008, 10
  • [6] KINETIC PROCESSES IN HE-CD POSITIVE-COLUMN AND HOLLOW-CATHODE PLASMAS UNDER PULSED DISCHARGE EXCITATION
    BOULMERLEBORGNE, C
    DUBREUIL, B
    [J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1990, 23 (08) : 1029 - 1035
  • [7] CHAMBERS SA, 2003, MRS B OCT
  • [8] CHEN Y, 1967, PHYS REV, V154, P843
  • [9] Kinetic model of energy transfer processes between low-coordinated ions on MgO by photoluminescence decay measurements
    Chizallet, C
    Cclstentin, G
    Krafft, JM
    Lauron-Pernot, H
    Che, M
    [J]. CHEMPHYSCHEM, 2006, 7 (04) : 904 - 911
  • [10] Controlling the photoluminescence of CdSe/ZnS quantum dots with a magnetic field
    Di Vece, M.
    Kolaric, B.
    Baert, K.
    Schweitzer, G.
    Obradovic, M.
    Vallee, R. A. L.
    Lievens, P.
    Clays, K.
    [J]. NANOTECHNOLOGY, 2009, 20 (13)
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