کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5492011 | 1525135 | 2017 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Frequency shifts of infrared active phonon modes in orthorhombic Dy1âx YxMn2O5
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Frequency shifts of infrared active phonon modes in orthorhombic Dy1âx YxMn2O5 Frequency shifts of infrared active phonon modes in orthorhombic Dy1âx YxMn2O5](/preview/png/5492011.png)
چکیده انگلیسی
A systematic investigation of infrared active phonon excitations in the orthorhombic Dy1-xYxMn2O5 with x=0, 0.2, 0.4, 0.6, 0.8, and 1 was carried out at room temperature. A detailed analysis towards the correlation between both local structural response and local lattice distortion has been undertaken. Frequency shifts of several phonons were observed, which strongly depends on the Y concentration and are likely to be associated with the electron-phonon coupling. A strong evidence for structural distortions of MnO6 and MnO5 has been observed in the high frequency range. The optical band gap has also been determined through optical conductivity and UV-visible absorption spectra, indicating semiconducting behavior of all members of the series Dy1-xYxMn2O5.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 514, 1 June 2017, Pages 30-36
Journal: Physica B: Condensed Matter - Volume 514, 1 June 2017, Pages 30-36
نویسندگان
Javed Ahmad, Mehr Khalid Rahmani, Jawaria Mansoor, M. Tufiq Jamil, Tahir Sultan, Syed Hamad Bukhari,