Electronic Structures of Fe3-xVxSi Probed by Photoemission Spectroscopy
文献类型：会议论文
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| 作者 | Cui YT(崔艺涛) ; Guo FZ(郭方准) ; 木村昭夫 ; 宫本幸治 ; Xie T(谢天) ; Qiao S(乔山) ; 生天目博文 ; 齐藤佑儿 ; 小林启介 ; 阿让班塞尔 ; Lu YW(鹿右武) |
| 出版日期 | 2010-05-23 |
| 会议名称 | the 9th international conference on spectroscopies in novel superconductors |
| 会议日期 | 2010-5-23 |
| 会议地点 | 中国 |
| 页码 | 138/2 |
| 其他题名 | 利用光电子谱进行 fe3-xvxsi电子状态的研究 |
| 通讯作者 | 崔艺涛 |
| 中文摘要 | heusler-type ternary and pseudobinary compounds y2zx ( y and z denote transition metal atoms and x is a metalloid) in the l21 or do3 structure, which exhibit remarkable “site-selectivity” properties, have received renewed interest owing to their ferromagnetic shape memory, half-metallic electronic structure and thermoelectric properties etc. among them, fe3-xvxsi (0 ≤ x ≤ 1) alloys show some remarkable electronic and magnetic property. it is known that magnetic structure of fe3-xvxsi changes from ferromagnetic to antiferromagnetic ones with increasing the content of nonferromagnetic v. it is also reported that fe3-xvxsi compounds show anomalous resistivity properties 1) and negative seebeck coefficient (thermoelectric power) at larger x 2). in order to clarify the origin of these novel properties of fe3-xvxsi alloys in terms of the electronic structures, the valence-band as well as core-level photoelectron spectroscopy has been performed at bl-23su of spring-8 with soft x-ray and at bl-29xu of spring-8 with hard x-ray. in this study it is to be clarified that the main structures of 1s, 2p core level spectra of si, fe and v shift to the higher binding energy with the addition of the v concentration due to the chemical potential shift; as for the spectra of valence band, with the increase of v concentration, the main structures shift to higher binding energy, which should be the evidences for the movement of fermi level to higher energy; the high resolution x-ray photoemission spectra also show that the intensity around fermi level decreases with adding v, and a new sharp structure formed for x = 1, which indicate the formation of pseudo-gap at large x. the comparisons of experimental valence band spectra with those of the total dos calculated with kkr-cpa method 1) are also done in this study. *this work was done under the approval of the spring-8 proposal assessing committee (proposal no. 2005b3811）and was also supported by the ministry of education, culture, sports, sciences and technology of japan. 1) y. nishino, et al, phys. rev. b 48, (1993)13607. 2) o. nashima, et al, j. alloys compd., 383, (2004)298. 3) a. bansil, et al, phys. rev. b 60, (1999)13396. |
| 会议主办者 | 复旦大学 |
| 学科主题 | 物理化学 |
| 语种 | 中文 |
| 源URL | [http://159.226.238.44/handle/321008/114528]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 推荐引用方式 GB/T 7714 | Cui YT,Guo FZ,木村昭夫,et al. Electronic Structures of Fe3-xVxSi Probed by Photoemission Spectroscopy, 利用光电子谱进行 Fe3-xVxSi电子状态的研究[C]. 见:the 9th international conference on spectroscopies in novel superconductors. 中国. 2010-5-23. |
入库方式： OAI收割
来源：大连化学物理研究所
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