EFFECTIVENESS OF IRON CLUSTERS AS PINNING CENTERS IN THE YBA2(CU1-XFEX)3OY SYSTEM

被引：7
|
作者：
KATSUYAMA, S [1 ]
MAJIMA, K [1 ]
NAGAI, H [1 ]
KOSUGE, K [1 ]
机构：
[1] KYOTO UNIV, FAC SCI, DEPT CHEM, KYOTO 606, JAPAN
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1992年 / 31卷 / 8B期
关键词：
SUPERCONDUCTOR; MAGNETIC HYSTERESIS; PINNING CENTER; IRON CONFIGURATION; IRON CLUSTER;
D O I：
10.1143/JJAP.31.L1172
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The magnetic hysteresis curve of YBa2(Cu1-xFex)3Oy (0 less-than-or-equal-to x less-than-or-equal-to 0.08) prepared by means of two kinds of heat treatment was measured by superconducting quantum interference device (SQUID) magnetometer. YBa2(Cu1-xFex)3Oy samples were slowly cooled from 890-degrees-C in air, and then some were heated at 800-degrees-C in N2 gas. All products, including those heated in N2 gas, were annealed at below 400-degrees-C in O2 gas. The difference DELTA-M in the hysteretic magnetization between the increasing and decreasing magnetic fields of the samples treated in N2 gas shows the maximum value at x = 0.02. This indicates that the clustered Fe atoms formed in the Cu1-O planes act as effective pinning centers for flux lines.
引用
收藏
页码：L1172 / L1175
页数：4
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