Phase transition and extended X-ray absorption fine structure of melt-spun amorphous Fe100−xYx alloys

Autor:	K Yano, Ikuo Nakai, Hideaki Takano
Rok vydání:	2008
Předmět:	Phase transition Amorphous metal Materials science Spin glass Condensed matter physics Extended X-ray absorption fine structure Analytical chemistry Curie temperature Condensed Matter Physics Magnetic susceptibility Electronic Optical and Magnetic Materials Amorphous solid Phase diagram
Zdroj:	Journal of Magnetism and Magnetic Materials. 320:1503-1511
ISSN:	0304-8853
DOI:	10.1016/j.jmmm.2007.12.009
Popis:	The phase diagram and local structure of melt-spun amorphous (a-) Fe 100− x Y x (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, T g and T f , were obtained in the RSG state. The T g , T f and Curie temperature T C decrease with increasing x , and the T C and T g vanish at x =60. A new magnetic phase diagram for the melt-spun a-Fe 100− x Y x alloys was obtained from magnetic measurements for higher Y concentration. The magnetic states of the a-Fe 100− x Y x 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::af5d1bd4764236c4d736a3a0290b0fa5 https://doi.org/10.1016/j.jmmm.2007.12.009 Zobrazit plný text záznamu Full Text from ScienceDirect