REFLECTION HIGH-ENERGY ELECTRON-DIFFRACTION OSCILLATIONS MODULATED BY LASER-PULSE DEPOSITED YBA2CU3O7-X

被引：93

作者：

KARL, H

STRITZKER, B

机构：

[1] University of Augsburg, Institut für Physik, D-8900 Augsburg

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.69.2939

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Reflection high-energy electron diffraction oscillations during pulsed laser ablation of YBa2Cu3O7-x on SrTiO3(100) substrates were measured. We have found for the first time that the oscillations are modulated by the laser-pulse repetition frequency. Each laser pulse deposits 0.14 nm of material. This causes the specularly reflected intensity to decrease instantaneously, but then it increases exponentially due to crystallization. An activation energy of 0.7 +/- 0.1 eV and a diffusion constant of 1.4 x 10(-12) cm2/sec at 720-degrees-C for the formation of c-axis oriented films was determined.

引用

页码：2939 / 2942

页数：4

共 13 条

[1]

BRUTON WK, 1951, PHILOS T R SOC LON A, V243, P299

[2] LAYER-BY-LAYER DEPOSITION OF LA1.85SR0.15CUOX FILMS BY PULSED LASER ABLATION [J].