SHIFT OF CORE-LEVEL BINDING-ENERGY OF STRONTIUM DUE TO GAMMA-IRRADIATION IN BI2SR2CACU2OY CRYSTALS

Authors
WANG LB WU WB ZHU JS SUN XF ZHAO XR ZHOU GE LI XG ZHANG YH
Citation
Lb. Wang et al., SHIFT OF CORE-LEVEL BINDING-ENERGY OF STRONTIUM DUE TO GAMMA-IRRADIATION IN BI2SR2CACU2OY CRYSTALS, Physica. C, Superconductivity, 282, 1997, pp. 989-990
Citations number
10
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
282
Year of publication
1997
Part
2
Pages
989 - 990
Database
ISI
SICI code
0921-4534(1997)282:<989:SOCBOS>2.0.ZU;2-Z
Abstract
Bi2Sr2CaCu2Oy crystals were irradiated by Co-60 gamma-rays at a dose r ate of 6 kGy/h up to 7.2, 60 and 648 kGy, respectively, at room temper ature. X-ray photoemission spectroscopy results reveal that the core-l evel binding energy of strontium shifts to higher energy with increasi ng the gamma-ray dose. Corresponding to these results, the superconduc ting transition temperature T-c unchanged at low dose, then increased with dose and decreased at 648 kGy. The shift of core-level binding en ergy of strontium is related to the change of the hole concentration.