OXYGEN DESORPTION FROM YBA2CU3O7-X AND BI2CASR2CU2O8+DELTA SUPERCONDUCTORS

被引：8

作者：

MESARWI, A ^{[1
]}

LEVENSON, LL ^{[1
]}

IGNATIEV, A ^{[1
]}

机构：

[1] UNIV HOUSTON,CTR SPACE VACUUM EPITAXY,HOUSTON,TX 77204

来源：

JOURNAL OF APPLIED PHYSICS | 1991年 / 70卷 / 03期

关键词：

D O I：

10.1063/1.349522

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Oxygen desorption experiments from YBa2Cu3O7-x (YBCO) and Bi2CaSr2Cu2O8+delta (BSCCO) superconductors were carried out using a quadrupole mass spectrometer for monitoring the desorbing species and x-ray photoemission spectroscopy for surface characterization. Molecular oxygen was found to desorb from both superconductors following photoirradiation with ultraviolet/optical radiation and subsequent heating at over 150-degrees-C. Both YBCO and BSCCO were found to have similar oxygen desorption rates and similar activation energies (10(12)-10(13) molecules/cm2 s and approximately 1.5 eV/molecule, respectively). The desorption data as well as the x-ray photoemission data indicate that the oxygen desorption is not intrinsic to the superconductors but rather due to molecular oxygen entrapped in the material.

引用

页码：1591 / 1595

页数：5

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