کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1867061 1038153 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Theory of phonon properties in doped and undoped CuO nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
Theory of phonon properties in doped and undoped CuO nanoparticles
چکیده انگلیسی

We have studied the phonon properties of CuO nanoparticles and have shown the importance of the anharmonic spin–phonon interaction. The Raman peaks of CuO nanoparticles shift to lower frequency and become broader as the particle size decreases in comparison with those of bulk CuO crystals owing to size effects. By doping with different ions, in dependence of their radius compared to the host ionic radius the phonon energies ω could be reduced or enhanced. The phonon damping is always enhanced through the ion doping effects.


► The phonon properties of CuO nanoparticles are studied using a miscroscopic model.
► The phonon energy decreases whereas the damping increases with decreasing of particle size.
► It is shown the importance of the anharmonic spin–phonon interaction.
► By doping with RE-ions the phonon energy is reduced, whereas with TM-ions it is enhanced.
► The phonon damping is always enhanced through the ion doping effects.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 376, Issue 33, 2 July 2012, Pages 2252–2255
نویسندگان
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