کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1816601 | 1525265 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure and dynamics on superionic conducting phosphate glasses by neutron scattering
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
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چکیده انگلیسی
Neutron diffraction and inelastic scattering experiments have been performed on superionic conducting phosphate glasses, AgI-AgPO3 and its undoped glass AgPO3. In general, the static, elastic and dynamic structure factors S(Q), S(Q, Ï=0), S(Q, Ï), respectively, exhibit a prepeak at very low Qâ¼0.7Â Ã
â1 related to the intermediate range order â¼10Â Ã
, but not for the AgPO3. The low-energy excitation, or Boson peak (BP), at around 2-3 meV appears in all undoped and doped glasses.The amplitude of the BP increases and the position shifts to lower energy with addition of AgI. The inelastic contribution can be expressed in terms of sound waves, ÎS(Q,Ï) α Q2 S(Q), which is consistent with an acoustic mode. The expansion of the phosphate network plays a dominant role on increasing the mobility of the Ag ions, the ionic conductivity, the prepeak and the BP intensities.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volumes 385â386, Part 1, 15 November 2006, Pages 236-239
Journal: Physica B: Condensed Matter - Volumes 385â386, Part 1, 15 November 2006, Pages 236-239
نویسندگان
E. Kartini, M. Arai, F. Mezei, M. Nakamura, M. Russina,