Chemical instability of the cobalt oxyhydrate superconductor under ambient conditions

被引：84

作者：

Foo, ML

Schaak, RE

Miller, VL

Klimczuk, T

Rogado, NS

Wang, Y

Lau, GC

Craley, C

Zandbergen, HW

Ong, NP

Cava, RJ

机构：

[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[2] Gdansk Univ Technol, Fac Appl Phys & Math, PL-80952 Gdansk, Poland

[3] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[4] Delft Univ Technol, Mat Sci Lab, Natl Ctr HREM, NL-2628 AL Delft, Netherlands

[5] Princeton Univ, Princeton Mat Inst, Princeton, NJ 08540 USA

来源：

SOLID STATE COMMUNICATIONS | 2003年 / 127卷 / 01期

基金：

美国国家科学基金会;

关键词：

superconductivity; X-ray diffraction; thermogravimetric analysis;

D O I：

10.1016/S0038-1098(03)00334-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The layered sodium cobalt oxyhydrate superconductor Na0.3CoO2.1.4H(2)O is shown through X-ray diffraction and thermogravimetric studies to be one of the series of hydrated phases of Na0.3CoO2. Further, it is shown that the material is exceptionally sensitive to both temperature and humidity near ambient conditions, easily dehydrating to a non-superconducting lower hydrate. The observation of this stable lower hydrate with c = 13.8 Angstrom implies that the superconductivity turns on in this system between CoO2 layer spacings of 6.9 and 9.9 Angstrom at nominally constant chemical doping. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：33 / 37

页数：5

共 6 条

[1] POSSIBLE HIGH-TC SUPERCONDUCTIVITY IN THE BA-LA-CU-O SYSTEM [J].

BEDNORZ, JG ;

MULLER, KA .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1986, 64 (02) :189-193

[2]

FOUSSASSIER C, 1973, J SOLID STATE CHEM, V6, P532

[3] SUPERCONDUCTIVITY IN A LAYERED PEROVSKITE WITHOUT COPPER [J].

MAENO, Y ;

HASHIMOTO, H ;

YOSHIDA, K ;

NISHIZAKI, S ;

FUJITA, T ;

BEDNORZ, JG ;

LICHTENBERG, F .

NATURE, 1994, 372 (6506) :532-534

[4] Superconductivity in two-dimensional CoO2 layers [J].

Takada, K ;

Sakurai, H ;

Takayama-Muromachi, E ;

Izumi, F ;

Dilanian, RA ;

Sasaki, T .

NATURE, 2003, 422 (6927) :53-55

[5] Large thermoelectric power in NaCo2O4 single crystals [J].

Terasaki, I ;

Sasago, Y ;

Uchinokura, K .

PHYSICAL REVIEW B, 1997, 56 (20) :12685-12687

[6]

WANG Y, IN PRESS NATURE

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