HIGH-DENSITY, ULTRAFINE PRECIPITATES IN YBA2CU3O7-X THIN-FILMS PREPARED BY PLASMA-ENHANCED METALORGANIC CHEMICAL VAPOR-DEPOSITION

被引：77

作者：

LU, P

LI, YQ

ZHAO, J

CHERN, CS

GALLOIS, B

NORRIS, P

KEAR, B

COSANDEY, F

机构：

[1] Department of Mechanics and Materials Science, Rutgers University, Piscataway

来源：

APPLIED PHYSICS LETTERS | 1992年 / 60卷 / 10期

关键词：

D O I：

10.1063/1.107341

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Thin films of yttrium-rich YBa2Cu3O7-x with c-axis orientation prepared by plasma-enhanced metalorganic chemical vapor deposition have been examined by high-resolution transmission electron microscopy. Yttria precipitates smaller than 50 (angstrom) in size have been identified in the matrix. They are uniformly distributed, have a high density as large as 10(24) per cubic meter and are oriented with respect to the matrix. The magnetic field dependence of the critical current density of the thin films indicates that the yttria precipitates are effective flux pinning centers.

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页码：1265 / 1267

页数：3

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