ALKALI-FULLERIDE SUPERCONDUCTORS - SYNTHESIS, COMPOSITION, AND DIAMAGNETIC SHIELDING

被引：687

作者：

HOLCZER, K

KLEIN, O

HUANG, SM

KANER, RB

FU, KJ

WHETTEN, RL

DIEDERICH, F

机构：

[1] UNIV CALIF LOS ANGELES,DEPT CHEM & BIOCHEM,LOS ANGELES,CA 90024

[2] UNIV CALIF LOS ANGELES,CTR SOLID STATE SCI,LOS ANGELES,CA 90024

来源：

SCIENCE | 1991年 / 252卷 / 5009期

关键词：

D O I：

10.1126/science.252.5009.1154

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The recent report of a superconductivity onset near the critical temperature T(c) = 18 K in potassium-doped C60 raises questions concerning the composition and stability of the superconducting phase. The effects of mixing and heat treatment of K(x) C60 samples prepared over a wide range of initial compositions on the superconducting transition was determined from shielding diamagnetism measurements. A single superconducting phase (T(c) = 19.3 K) occurs for which the composition is K3C60. The shielding reaches a maximum of greater than 40 percent of the perfect diamagnetism, a high value for a powder sample, in samples prepared from 3:1 mixtures. A Rb(x)C60 sample prepared and analyzed in an analogous way exhibited evidence for superconductivity with T(c) = 30 K and a diamagnetic shielding of 7 percent could be obtained.

引用

页码：1154 / 1157

页数：4

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