Mössbauer study of amorphous Fe2RE (RE=Ce,Er) alloys |
| |
| Authors: | M Ghafari Y Nakamura K Fukamichi M Matsuura |
| |
| Institution: | (1) Nisshin Steel, Steel R&D Laboratories, 592 Sakai, Japan;(2) Faculty of Science and Technology, Ryukoku University, 520 Otsu, Japan;(3) Institute of Material Research, Tohoku University, Sendai, Japan;(4) Miyagi National College of Technology, Miyagi, Japan |
| |
| Abstract: | Among amorphous Fe2RE (RE=Er, Ce, Gd, La, Pr, Sm, Dy, Ho) alloys, Fe2Ce exhibits a tendency toward short range order, while the other Fe2RE compounds show clustering. However, we have almost no information about environments around Fe atoms. Using Mössbauer spectroscopy we have determined the quadrupole splitting distributionsP(QS) of two representative amorphous Fe2RE (RE=Ce, Er) alloys, leading to local environments of Fe atoms. The analysis of the mixed magnetic dipole and quadrupole interactions in Fe2Er shows two kinds of electrical field gradients (EFT) with the positive and negative signs in the sample, indicating a random packing of Fe atoms. Furthermore, the analyzed quadrupole splitting distributionP(QS) of Fe2Er also supports random packing in this amorphous alloy. On the other hand, the amorphous Fe2Ce alloy shows two kinds of distributions of quadrupole splitting; the major component indicating random packing and the minor component Ce-rich Ce-Fe clusters. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
