The high temperature preparation and property measurements of CaTaN2: A ternary superconducting nitride

被引：40

作者：

Balbarin, V ^{[1
]}

VanDover, RB ^{[1
]}

Disalvo, FJ ^{[1
]}

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1996年 / 57卷 / 12期

基金：

美国国家科学基金会;

关键词：

superconductors; chemical synthesis; X-ray diffraction; electrical properties; superconductivity;

D O I：

10.1016/S0022-3697(96)00066-2

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Highly crystalline CaTaN2 was prepared by the reaction of Ca(NH2)(2) and Ta3N5 in a specially designed reaction vessel at high temperatures (> 1300 degrees C). Even when reaction conditions varied considerably, the samples were always contaminated by small amounts of Ca2TaN3, TaN, or TaN0.1. SQUID measurements obtained on a sample contaminated by Ca2TaN3 and a sample contaminated by TaN and TaN0.1 showed superconducting transitions at 9.6 K and 9.1 K, respectively. Resistivity measurements carried out on a sintered pellet of CaTaN2 contaminated by TaN0.1 showed a rho(300 K) = 0.0147 omega cm and weakly rising resistivity with lower temperatures, likely due to the random alignment of the polycrystalline grains.

引用

页码：1919 / 1927

页数：9

共 11 条

[1]

BROKAMP T, 1991, THESIS DORTMUND

[2] Ternary nitrides: A rapidly growing class of new materials [J].