کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1815601 | 1025667 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of Cr-doping on thermal transport property in perovskite R0.7A0.3Mn1âxCrxO3
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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: Effect of Cr-doping on thermal transport property in perovskite R0.7A0.3Mn1âxCrxO3 Effect of Cr-doping on thermal transport property in perovskite R0.7A0.3Mn1âxCrxO3](/preview/png/1815601.png)
چکیده انگلیسی
The thermal conductivity k(T) of R0.7A0.3Mn1-xCrxO3 (R=La, Nd; A=Ca, Sr) have been studied as a function of Cr content (x) ranging from 0.01 to 0.60. The Cr3+ ions substitution for Mn3+ ions causes the orbital defect of electrons, resulting in the volume shrinkage of lattice. The light doping of Cr strongly suppresses the thermal conductivity k over a wide range of temperature. On the contrary, for the heavily Cr doping samples, a clear rebound in k was observed at the higher temperature region studied, which is not consistent with a typical impurity effect on lattice thermal conductivity. These findings are discussed on the basis of the lattice distortion associated with the local Jahn-Teller effect through orbital-lattice coupling, and as well the spin-dependent scattering through spin-lattice interactions
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 389, Issue 2, 15 February 2007, Pages 252-257
Journal: Physica B: Condensed Matter - Volume 389, Issue 2, 15 February 2007, Pages 252-257
نویسندگان
H.P. Gao, B.M. Wu, B. Li,