کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1803994 | 1524899 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The microstructure and electronic transport properties of mechanical milled La2/3Ca1/3MnO3 perovskites
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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: The microstructure and electronic transport properties of mechanical milled La2/3Ca1/3MnO3 perovskites The microstructure and electronic transport properties of mechanical milled La2/3Ca1/3MnO3 perovskites](/preview/png/1803994.png)
چکیده انگلیسی
Polycrystalline perovskite La2/3Ca1/3MnO3 samples were synthesized by mechanical ball milling for 10 h and subsequent sintering at the temperatures from 850 to 1400 °C. The microstructure and electronic transport properties were studied. All samples exhibited the metal-to-insulator transition at the temperature, which is nearly the same as that of La2/3Ca1/3MnO3 single crystal. The samples with grain size of 170-2500 nm showed the extrinsic magnetoresistance (MR) over a wide temperature range from the metal-to-insulator temperature (TMI) to 100 K in an applied field of 3 kOe. The samples with the grain size above 4500 nm showed the intrinsic MR near TMI. A clear image of the coexistence of intrinsic MR and extrinsic MR were observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 320, Issues 3â4, February 2008, Pages 257-262
Journal: Journal of Magnetism and Magnetic Materials - Volume 320, Issues 3â4, February 2008, Pages 257-262
نویسندگان
Y.H. Xiong, W. Xu, Y.T. Mai, H.L. Pi, C.L. Sun, X.C. Bao, W.H. Huang, C.S. Xiong,