SUPERCONDUCTING PROPERTIES OF LA2CUO4+DELTA ANNEALED IN HIGH-PRESSURE OXYGEN GAS

被引：16

作者：

ODA, Y

YAMADA, M

OCHIAI, H

ASAYAMA, K

KOHARA, T

YAMADA, Y

KOGA, K

KASHIWAI, S

MOTOYAMA, M

机构：

[1] HIMEJI INST TECHNOL,BASIC RES LAB,HIMEJI,HYOGO 67122,JAPAN

[2] HIMEJI INST TECHNOL,DEPT ELECT ENGN,HIMEJI,HYOGO 67122,JAPAN

[3] IND RES INST,KOBE,HYOGO 654,JAPAN

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 73卷 / 10期

关键词：

Neel Temperature - Superconducting Phase - Temperature Dependent Paramagnetism - Zero Magnetic Field Cooling;

D O I：

10.1016/0038-1098(90)90562-P

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Electrical and magnetic properties of (La1-xSrx)2CuO4+δ annealed in high pressure oxygen gas up to 400 bar are studied. The superconducting La2CuO4+δ includes two separate phases: one is the superconducting phase with extra oxygen, and the other is the well known antiferromagnetic phase with Néel temperature TN at 240-300 K depending on the annealing atmosphere. The superconducting phase in the undoped sample becomes unstable by Sr doping. In the high pressure oxygen annealed La2CuO4+δ, a temperature dependent paramagnetism is observed even below TN, and spontaneous vortices are considered to be induced in the zero magnetic field cooling. © 1990.

引用

页码：725 / 728

页数：4

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