UV-LIGHT IRRADIATION EFFECTS ON OXIDE SUPERCONDUCTING THIN-FILMS

被引：2

作者：

ENOKIHARA, A

KOHIKI, S

HIGASHINO, H

SETSUNE, K

WASA, K

机构：

[1] Central Research Laboratories, Matsushita Electric Industrial Co. Ltd., Morighuchi

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1991年 / 27卷 / 02期

关键词：

D O I：

10.1109/20.133478

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Bi2Sr2CaCu2O(x) thin films prepared on (100) MgO substrates by rf magnetron sputtering were irradiated with ultra-violet (UV) light in He gas of about 500 Pa using a low pressure mercury lamp. The zero-resistance temperature and the critical current density were gradually decreased with irradiation time. X-ray photoemission spectra showed that the mean Cu valence of the film was decreased approximately from +2 to +1 by the irradiation while the valence of Bi ions was not changed. These imply that the UV light irradiation selectively reduces Cu ions and the superconductivity strongly depends on the Cu valence.

引用

收藏

页码：1544 / 1547

页数：4

相关论文

共 9 条

[1] ESCA STUDY OF TERMINATION OF PASSIVATION OF ELEMENTAL METALS [J].

BARR, TL .

JOURNAL OF PHYSICAL CHEMISTRY, 1978, 82 (16) :1801-1810

[2] GAMMA-RADIATION RESISTANCE OF THE HIGH-TC SUPERCONDUCTOR YBA2CU3O7-DELTA [J].

BOHANDY, J ;

SUTER, J ;

KIM, BF ;

MOORJANI, K ;

ADRIAN, FJ .

APPLIED PHYSICS LETTERS, 1987, 51 (25) :2161-2163

[3] ION-BEAM AMORPHIZATION OF YBA2CU3OX [J].

CLARK, GJ ;

LEGOUES, FK ;

MARWICK, AD ;

LAIBOWITZ, RB ;

KOCH, R .

APPLIED PHYSICS LETTERS, 1987, 51 (18) :1462-1464

[4] FAST-NEUTRON IRRADIATION OF YBA2CU3OX [J].

COST, JR ;

WILLIS, JO ;

THOMPSON, JD ;

PETERSON, DE .

PHYSICAL REVIEW B, 1988, 37 (04) :1563-1568

[5] X-RAY-IRRADIATION EFFECTS ON ERBA2CU3O7-X SUPERCONDUCTING THIN-FILMS [J].

ENOKIHARA, A ;

KOHIKI, S ;

SETSUNE, K ;

WASA, K ;

HIGASHI, Y ;

FUKUSHIMA, S ;

GOSHSI, Y .

PHYSICA C, 1989, 161 (03) :431-434

[6] ELECTRON-SPECTROSCOPY OF ND2-XCEXCUO4-Y (X=0, 0.15, AND 0.23) THIN-FILMS [J].

KOHIKI, S ;

HAYASHI, S ;

ADACHI, H ;

HATTA, S ;

SETSUNE, K ;

WASA, K .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1989, 58 (11) :4139-4146

[7] ELECTRON-IRRADIATION INDUCED AMORPHIZATION IN YBA2CU3O7 AND GDBA2CU3O7 SUPERCONDUCTORS [J].

NASTASI, M ;

PARKIN, DM ;

ZOCCO, TG ;

KOIKE, J ;

OKAMOTO, PR .

APPLIED PHYSICS LETTERS, 1988, 53 (14) :1326-1328

[8] OZONE-UV IRRADIATION EFFECTS ON BA2YCU3O7-X THIN-FILMS [J].

TAMURA, H ;

YOSHIDA, A ;

MOROHASHI, S ;

HASUO, S .

APPLIED PHYSICS LETTERS, 1988, 52 (25) :2183-2185

[9] PARAMAGNETISM AND SHAKE-UP SATELLITES IN X-RAY PHOTOELECTRON-SPECTRA [J].

YIN, L ;

ADLER, I ;

TSANG, T ;

MATIENZO, LJ ;

GRIM, SO .

CHEMICAL PHYSICS LETTERS, 1974, 24 (01) :81-84