کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10653230 | 1002851 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Open atmosphere synthesis and wide range colossal magnetoresistance in La0.7Sr0.3âxHgxMnO3 (0â¤xâ¤0.2) system
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Open atmosphere synthesis and wide range colossal magnetoresistance in La0.7Sr0.3âxHgxMnO3 (0â¤xâ¤0.2) system Open atmosphere synthesis and wide range colossal magnetoresistance in La0.7Sr0.3âxHgxMnO3 (0â¤xâ¤0.2) system](/preview/png/10653230.png)
چکیده انگلیسی
We have synthesized several polycrystalline samples with nominal compositions La0.7Sr0.3âxHgxMnO3+δ (0â¤xâ¤0.2) by the standard solid-state reaction method. Instead of the sealed quartz tube method widely employed for the Hg-based systems, we adopted open atmosphere synthesis route. All the samples exhibited monophasic nature with rhombohedral structure as revealed by the X-ray diffraction data. A variation in the unit cell volume is observed with x, which is interpreted as a result of extra oxygen in-diffusion and subsequent cation vacancy creation. A broad metallic behavior is seen in the entire temperature range from 300 to 4 K. The samples showed varying amount of colossal magnetoresistance depending upon the temperature and applied magnetic field. The MR value as high as 30% was observed in x=0.2 sample and the MR is persistent over a wide temperature range with a little change in magnitude.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 135, Issue 3, July 2005, Pages 208-213
Journal: Solid State Communications - Volume 135, Issue 3, July 2005, Pages 208-213
نویسندگان
Vilas Shelke, Subhash Khatarkar, Rajiv Rawat, R.K. Singh,