Fullerides: heterometallic superconductors with composition M2M′C60 (M = K, Rb; M′ = Yb, Lu, Sc)
作者:B. M. Bulychev、R. A. Lunin、V. A. Kul’bachinskii、R. V. Shpanchenko、V. I. Privalov
DOI:10.1007/s11172-005-0018-9
日期:2004.8
K, Rb; k = 3—6) and K6C60 + m K mixtures (m = 1, 3) with anhydrous salts M′Cl3 (M′ = La, Pr, Nd, Sm, Gd, Tb, Yb, Lu, Y, Sc) and YbI2 in a toluene—THF medium afforded heterometallic fullerides M3–nM′nC60 (n = 1—3). Among these compounds, substituted fullerides with composition M2M′C60 (M′ = Yb, Lu, Sc) display superconducting properties with critical temperatures of 14—20 K.
具有 MkC60 (M = K, Rb; k = 3-6) 和 K6C60 + m K 混合物 (m = 1, 3) 的钾和富勒酸铷的一步或两步反应与无水盐 M'Cl3 (M' = La、Pr、Nd、Sm、Gd、Tb、Yb、Lu、Y、Sc)和 YbI2 在甲苯-THF 介质中提供异金属富勒化物 M3-nM'nC60(n = 1-3)。在这些化合物中,组成为 M2M'C60 (M' = Yb, Lu, Sc) 的取代富勒烯显示出临界温度为 14-20 K 的超导特性。