کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1619648 | 1516386 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of chemical pressure on the magnetism of Pr0.7Ca0.3âxSrxMnO3 (x = 0.0-0.3)
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Influence of chemical pressure on the magnetism of Pr0.7Ca0.3âxSrxMnO3 (x = 0.0-0.3) Influence of chemical pressure on the magnetism of Pr0.7Ca0.3âxSrxMnO3 (x = 0.0-0.3)](/preview/png/1619648.png)
چکیده انگلیسی
We have studied the effect of chemical pressure on the magnetic properties of a series of Pr0.7Ca0.3âxSrxMnO3 (x = 0.0-0.3) (PCSMO) compounds. The parent compound Pr0.7Ca0.3MnO3 (PCMO) is a well known charge-ordered compound. The selective substitution of Sr for Ca in PCMO leads to increase in electron count as a 4s metal (Ca) is being replaced by a 5s (Sr) alkali metal, resulting in melting of CO-state (in PCSMO) and increase in magnetic transition temperature (To) from 85 K (for x = 0.0) to 260 K (for x = 0.3). The lattice distortion factors, such as A-site variance (Ï2) and tolerance factor (Tf) vary linearly with To. The magnetocaloric effect (MCE shown as, ÎS) calculated from isothermal magnetization measurement exhibits maximum (at T = To) for x = 0.2 for a field change from 0 to 50 kOe. The variation of ÎS(x) mimic the variation of ÎS(Ï2), indicating the strong influence of Mn-O-Mn bond angle on the MCE. We discuss these results in terms of modification of magnetic properties in PCSMO through chemical pressure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 493, Issues 1â2, 18 March 2010, Pages L19-L24
Journal: Journal of Alloys and Compounds - Volume 493, Issues 1â2, 18 March 2010, Pages L19-L24
نویسندگان
Anjana Dogra, Sudhindra Rayaprol, P.D. Babu, G. Ravi Kumar, S.K. Gupta,