Superexchange and magnetic relaxation in novel Eu-doped C60 phases

被引：19

作者：

Ksari-Habiles, Y

Claves, D

Chouteau, G

Touzain, P

Jeandey, C

Oddou, JL

Stepanov, A

机构：

[1] Max Planck Inst Festkorperforsch, CNRS, High Field Magnet Lab, F-38042 Grenoble 9, France

[2] ENSEEG, Lab Electrochim & Phys Chim Mat & Interfaces, F-38402 St Martin Dheres, France

[3] Ctr Etud Nucl Genoble, MRS, SPSMS, DRFMC, F-38054 Grenoble 9, France

[4] Univ Aix Marseille 1, Ctr St Jerome, CNRS, Lab Electron Milieux Condenses, F-13397 Marseille 13, France

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1997年 / 58卷 / 11期

关键词：

fullerenes; europium; magnetism; Mossbauer; relaxation;

D O I：

10.1016/S0022-3697(97)00064-4

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

EuxC60 compounds have been synthesized using high temperature solid-solid reaction. For x = 3 and 6 new crystalline structures appear. Mossbauer experiments reveal the simultaneous presence of Eu2+ and Eu3+ ions. In Eu6C60, ferromagnetic Eu pairs form at 65 K through a superexchange mechanism via the bucky balls. Higher clusters form at lower temperatures. In Eu3C60, relaxation effects can be related with the presence of an amorphous state. (C) 1997 Elsevier Science Ltd.

引用

页码：1771 / 1778

页数：8

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