X-ray diffraction and magnetic susceptibility of sodium fullerides NaxC60

被引：3
|
作者：
Kobayashi, Mototada [1 ]
Kimata, Nozomu [1 ]
Heguri, Satoshi [1 ]
机构：
[1] Univ Hyogo, Dept Mat Sci, Grad Sch Mat Sci, Ako, Hyogo 6781297, Japan
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2010年 / 71卷 / 04期
关键词：
Fullerenes; Chemical synthesis; Crystal structure; Magnetic properties; Superconductivity; C-60; TRANSITION; NA6C60; NA2C60;
D O I：
10.1016/j.jpcs.2009.12.067
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The X-ray diffraction (XRD), magnetic susceptibility and electron spin resonance (ESR) measurements have been carried out for NaxC60. The XRD profiles with x < 4 can be assigned to a face-centered cubic (fcc) lattice, while those with 4 <= x to a hexagonal one. The temperature dependence of magnetic susceptibility chi for NaxC60 using SQUID was fitted to the Curie law, and estimated temperature-independent component chi(0). The composition x dependence of the chi(0) for NaxC60 shows two maxima at around x=3 and x=10, and minimum at x=6. The absence of Pauli contribution at x=6 was confirmed using ESR. A trace of superconducting transition at 14 K has been found for some NaxC60 specimens with 8 < x < 9. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：689 / 691
页数：3
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