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

页码：L1172 / L1175

页数：4

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