کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1819308 | 1525761 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magneto-optical imaging of iron-oxypnictide SmFeAsO1âxFx and SmFeAsO1ây
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We have prepared iron-oxypnictide SmFeAsO1âxFx by ambient-pressure technique and SmFeAsO1ây by high-pressure technique, and characterized their bulk and local magnetic properties by using SQUID magnetometer and magneto-optical imaging. While the high-pressure samples have densities close to the theoretical value, the ambient-pressure samples have several small voids. Despite these structural differences between the two kinds of samples, they both have superconducting transition temperature above 50Â K. In addition, magneto-optical images for both samples show similar kinds of inhomogeneities with large current concentrated in several grains and with small intergranular current. The estimated intragranular currents for both samples are over 105Â A/cm2 at low temperatures and low fields.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity - Volume 469, Issues 15â20, 15 October 2009, Pages 915-920
Journal: Physica C: Superconductivity - Volume 469, Issues 15â20, 15 October 2009, Pages 915-920
نویسندگان
T. Tamegai, Y. Nakajima, Y. Tsuchiya, A. Iyo, K. Miyazawa, P.M. Shirage, H. Kito, H. Eisaki,