کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1803902 1024635 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase transition and extended X-ray absorption fine structure of melt-spun amorphous Fe100−xYx alloys
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Phase transition and extended X-ray absorption fine structure of melt-spun amorphous Fe100−xYx alloys
چکیده انگلیسی

The phase diagram and local structure of melt-spun amorphous (a-) Fe100−xYx (22⩽x⩽62) alloys were investigated using AC and DC magnetic and extended X-ray absorption fine structure (EXAFS) measurements. The a-Fe–Y system shows reentrant spin glass (RSG) behavior for 42⩽x⩽58 and spin glass (SG) behavior for 60⩽x. Two SG transition temperatures, Tg and Tf, were obtained in the RSG state. The Tg, Tf and Curie temperature TC decrease with increasing x, and the TC and Tg vanish at x=60. A new magnetic phase diagram for the melt-spun a-Fe100−xYx alloys was obtained from magnetic measurements for higher Y concentration. The magnetic states of the a-Fe100−xYx alloys change remarkably around x=60 and an EXAFS study revealed that the average atomic distance between nearest-neighboring Fe atoms changes at approximately x=60.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 320, Issue 8, April 2008, Pages 1503–1511
نویسندگان
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