SUPERCONDUCTIVITY IN THE AXNBS2 INTERCALATION COMPOUNDS (A = CS, RB)

被引：19

作者：

CHEN, BH ^{[1
]}

EICHHORN, B ^{[1
]}

PENG, JL ^{[1
]}

GREENE, RL ^{[1
]}

机构：

[1] UNIV MARYLAND,DEPT PHYS,COLL PK,MD 20742

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1993年 / 103卷 / 02期

关键词：

D O I：

10.1006/jssc.1993.1105

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Four new AxNbS2 phases, where A = Cs, x = 0.34, 0.60; A = Rb, x = 0.33, 0.6, were prepared from Nb and A2CO3, in a CS2/Ar atmosphere at 700°C. The compounds were refined (Rietveld profile analysis) in P63/mmc symmetry. Crystal data were Cs0.34NbS2, a = 3.3452(5) ³, c = 18.424(5) ³; Cs0.60NbS2, a = 3.3539(6) ³, c = 18.324(1) ³; Rb0.33NbS2, a = 3.3425(5) ³, c = 18.075(2) ³; Rb0.6NbS2, a = 3.3462(3) ³, c = 17.986(2) ³. The compounds comprise a 2H-NbS2 host with trigonal prismatic Nb ions and alkali ions intercalated in trigonally distorted octahedral holes between NbS2 layers. Increasing the alkali content effects a decrease in the c lattice parameters due to decreases in inter layer S···S separations. Magnetic susceptibility and resistivity measurements indicate metallic behavior for all compounds below room temperature. The Cs phases are bulk type II superconductors (Cs0.34NbS2, Tc 3.0 K, Cs0.60NbS2, Tc = 2.0 K). © 1993 Academic Press, Inc.

引用

页码：307 / 313

页数：7

共 22 条

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