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
收藏
页码：725 / 728
页数：4
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