STRONG, ASYMMETRIC FLUX-PINNING BY MISCUT-GROWTH-INITIATED COLUMNAR DEFECTS IN EPITAXIAL YBA2CU3O7-X FILMS

被引：57

作者：

LOWNDES, DH ^{[1
]}

CHRISTEN, DK ^{[1
]}

KLABUNDE, CE ^{[1
]}

WANG, ZL ^{[1
]}

KROEGER, DM ^{[1
]}

BUDAI, JD ^{[1
]}

ZHU, S ^{[1
]}

NORTON, DP ^{[1
]}

机构：

[1] OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.74.2355

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Strong flux pinning and a pronounced asymmetric angular dependence of Jc(H,) have been discovered in YBa2Cu3O7-x films grown on miscut, mosaic LaAlO3 substrate surfaces. A new pinning peak, which at low fields is nearly as strong as the intrinsic pinning, is observed for magnetic field orientations between the c axis and the CuO2 plane. Cross-section transmission electron microscopy reveals columnar growth defects (23 nm diameter) aligned near the c axis, in concentrations 1010 cm-2. The results demonstrate that deliberately modified substrate surfaces may introduce technologically useful flux pinning in YBa2Cu3O7-x films. © 1995 The American Physical Society.

引用

页码：2355 / 2358

页数：4

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