STABILIZATION OF A NEW SUPERCONDUCTING PHASE BY LOW-TEMPERATURE FLUORINATION OF LA2CUO4

被引：77

作者：

CHEVALIER, B

TRESSAUD, A

LEPINE, B

AMINE, K

DANCE, JM

LOZANO, L

HICKEY, E

ETOURNEAU, J

机构：

[1] Laboratoire de Chimie du Solide, CNRS, Université Bordeaux I

来源：

PHYSICA C | 1990年 / 167卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(90)90491-V

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

When La2CuO4 is treated with pure F2 gas at 200°C, the X-ray diffraction pattern of the resulting product is characteristic of a new single phase derived from the K2NiF4-type structure. An enhancement of the orthorhombic distortion relative to the starting oxide is observed with: a = 5.342 Å; b = 5.436 Å and c = 13.192 Å. Both weight uptake and increase of the c unit cell constant could be consistent with an incorporation of fluorine atoms in the lattice. This new compound is superconducting at Tc = 40 K with Hc1 {reversed tilde equals} 700 Oe and exhibits a strong diamagnetic susceptibility (χg = -6.13 × 10-3emu/g) at 6 K under an applied field of 1 Oe. © 1990.

引用

页码：97 / 101

页数：5

共 18 条

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