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.

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页码：174 / 180

页数：7

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