FAR-INFRARED TRANSMISSION OF YBA2CU3O7-DELTA THIN-FILMS WITH COLUMNAR DEFECTS

被引：2
|
作者：
KAPLAN, SG
CHEN, M
DREW, HD
RAJESWARI, M
LIU, R
VENKATESAN, T
KANJILAL, D
SENAPATI, L
MEHTA, GK
机构：
[1] UNIV MARYLAND,CTR SUPERCONDUCT RES,COLLEGE PK,MD 20742
[2] NUCL SCI CTR,NEW DELHI,INDIA
来源：
PHYSICA C | 1994年 / 232卷 / 1-2期
关键词：
D O I：
10.1016/0921-4534(94)90310-7
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The far-infrared transmission of YBa2Cu3O7-delta films with columnar defects produced by high-energy ion irradiation has been measured from 20 to 150 cm-1 at 6 K in magnetic fields of 0-9 T. The change in transmission produced by irradiation can be understood by modeling the columnar defects as normal-metal or insulating cylinders in a superconducting background. Magnetic field induced spectral structure near 60 cm-1 in the pristine samples is suppressed by a defect density equal to the density of vortices at that field. However, the magneto-transmission above 60 cm-1 is nearly unaffected by the irradiation process. We discuss these results in terms of the current understanding of the nature of vortices and columnar defects in YBa2Cu3O7-delta.
引用
收藏
页码：174 / 180
页数：7
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