MICRO-RAMAN ANALYSIS OF PRECIPITATES ON YBA2CU3O7-DELTA FILMS

被引：5

作者：

DIECKMANN, N ^{[1
]}

BOCK, A ^{[1
]}

MERKT, U ^{[1
]}

机构：

[1] UNIV HAMBURG,INST ANGEW PHYS,D-20355 HAMBURG,GERMANY

来源：

PHYSICA C | 1995年 / 244卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(95)00043-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present micro-Raman spectra of different precipitates that are frequently observed on laser-deposited YBa2Cu3O7-delta films. Especially, we investigate two distinct types of droplets. Spherical droplets with smooth surfaces exhibit strong Raman lines at 510, 560, 595 and 628 cm(-1) and weaker ones at 132, 233, 266 and 306 cm(-1). All these modes are attributed to Ba2Cu3O59. The other type of droplet displays a substructure in the scanning electron microscope (SEM) and is identified as polycrystalline YBa2Cu3O7-delta, without preferential orientation. Needles growing at a 45 degrees angle with respect to the a/lb-axes of the film matrix are identified as tenorite (CuO) precipitates.

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页码：35 / 40

页数：6

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