کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7995023 | 1516162 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spin-lattice coupling and complex thermal expansion in Ca2FeAlO5
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
High resolution x-ray diffraction, strain gauge and Raman spectroscopy measurements of Ca2FeAlO5 as a function of temperature is reported, which provides the evidence of negative thermal expansion (NTE) and strong spin-lattice coupling in this compound. The unit cell showed a decrease in volume with increase in temperature with a distinct jump around 70 °C which corroborates with the magnetic ordering temperature and showed a contraction under magnetic field. The Raman spectra showed variation under magnetic field supporting spin-lattice coupling at room temperature. Most importantly, the NTE (β â
 â 6.41 Ã 10â5 °Câ1) is observed from room temperature up to â¼70 °C making it very attractive for applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 732, 25 January 2018, Pages 358-362
Journal: Journal of Alloys and Compounds - Volume 732, 25 January 2018, Pages 358-362
نویسندگان
Gaurav Sharma, Dhirendra Kumar, Shekhar Tyagi, V. Raghavendra Reddy, Rajeev Rawat, Anil K. Sinha, Niranjan P. Lalla, Vasant Sathe,