The polymorphism of samarium fullerides

被引：10

作者：

Claves, D ^{[1
]}

Hamwi, A ^{[1
]}

机构：

[1] Univ Blaise Pascal, Lab Mat Inorgan, ESA 6002, CNRS, F-63177 Aubiere, France

来源：

SOLID STATE COMMUNICATIONS | 1999年 / 113卷 / 06期

关键词：

fullerenes; crystal structure and symmetry; electronic states;

D O I：

10.1016/S0038-1098(99)00481-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Three different SmxC60 intercalation compounds have been identified. Sm2.75C60 has Pa (3) over bar symmetry and is characterized by tetrahedral cation vacancy-ordering. This phase coexists with a Pm (3) over bar Sm3C60 phase, under non-equilibrium conditions, when the metal concentration is increased in the mixture. A bcc Sm6C60 compound represents the upper limit of the doping level. The same behaviour was observed previously in the case of europium fullerides. The possibility that several oxidation states for both anions and cations may exist in M2.75C60 systems is examined. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：357 / 362

页数：6

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