کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1803902 | 1024635 | 2008 | 9 صفحه PDF | دانلود رایگان |

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.
Journal: Journal of Magnetism and Magnetic Materials - Volume 320, Issue 8, April 2008, Pages 1503–1511