Thermal Anomalies in Bi_2WO_6 and EPR of Doped Gd^<3+> Ions

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概要

• 論文の詳細を見る

• The dielectric constant ε'(ω, T), ε"(ω, T) and the electric conductivity σ(ω, T) of Bi_<2-x>Gd_xWO_6 single crystals have been measured in the temperature range from 350 K to 4.2 K and at frequencies from 20 Hz to 1 MHz. EPR measurements with an X-band spectrometer have been made on Gd^<3+>-doped Bi_2WO_6 crystals. Two kinds of centres observed are ascribed to Gd(1) and Gd(2) ions substituted for Bi(1) and Bi(2) ions, respectively. Fine structure parameters obtained are |b^0_2|=1367, 1138, and |b^2_2|=1060, 384 in units of 10^<-4> cm^<-1>. Temperature dependence of resonant fields for the Gd(1) centre shows a marked difference from that for the Gd(2) centre. This is due to the difference between the coupling of the two Gd ions to phonon modes.

• 社団法人日本物理学会の論文
• 1993-05-15

著者

• 竹内 秀夫

  Department Of Information Electronics School Of Engineering Nagoya University

• Arakawa Masanori

  Department of Physics, Nagoya Institute of Technology

• Takeuchi Hideo

  Department of Information Electronics, School of Engineering, Nagoya University

• Hirose Toshikazu

  Department of Physics, College of Liberal Arts, Kagoshima University

• Kawaminami Masaru

  Department of Physics, College of Liberal Arts, Kagoshima University

• Obara Kozo

  Department of Electrical and Electronics Engineering, Faculty of Engineering, Kagoshima University

• Tamai Hiroshi

  Department Of Fusion Plasma Research Japan Atomic Energy Research Institute

• Takeuchi Hideo

  Department Of Applied Physics Faculty Of Engineering Osaka City University

• Obara K

  Department Of Electrical And Electronics Engineering Faculty Of Engineering Kagoshima University

• Kawaminami M

  Department Of Physics Faculty Of Science Kagoshima University

• Kawaminami Masaru

  Department Of Physics College Of Liberal Arts Kagoshima University

• Tamai H

  Japan Atomic Energy Research Inst. Ibaraki Jpn

• Arakawa M

  Sophia Univ. Tokyo

• Arakawa Masanori

  Department Of Physics Faculty Of Science Nagoya University

• Hirose T

  Department Of Physics College Of Liberal Arts Kagoshima University

• Hirose Toshikazu

  Department Of Physics College Of Liberal Arts Kagoshima University

• Arakawa Mitsuyoshi

  Department Of Physics Sophia University

• Takeuchi Hiroshi

  Division Of Thermonuclear Fusion Research Japan Atomic Energy Research Institute Tokai Establishment

• Obara Kozo

  Department of Electrical and Electronic Engineering, Kagoshima University, Korimoto 1-21-40, Kagoshima 890, Japan

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