EFFECT OF DC ELECTRIC-FIELD ON THE EFFECTIVE MICROWAVE SURFACE IMPEDANCE OF YBA2CU3O7/SRTIO3/YBA2CU3O7 TRILAYERS

被引：39

作者：

FINDIKOGLU, AT ^{[1
]}

DOUGHTY, C ^{[1
]}

ANLAGE, SM ^{[1
]}

LI, Q ^{[1
]}

XI, XX ^{[1
]}

VENKATESAN, T ^{[1
]}

机构：

[1] UNIV MARYLAND,CTR SUPERCONDUCT RES,DEPT PHYS,COLL PK,MD 20742

来源：

APPLIED PHYSICS LETTERS | 1993年 / 63卷 / 23期

关键词：

D O I：

10.1063/1.110202

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the effect of a dc electric field on the effective microwave surface impedance of a thin film YBa2Cu3O7/SrTiO3/YBa2Cu3O7 (YBCO/STO/YBCO) trilayer by a dielectric resonator technique. At large dc electric fields ( > 10(5) V/cm), both the effective surface resistance and reactance of the sample decrease monotonically with increasing dc voltage applied to the to YBCO film, yielding at 25 K and 24.7 GHz \deltaR(s)/deltaV(dc)\ approximately 0.25 muOMEGA/V and \deltaX(s)/deltaV(dc)\ approximately 1.8 muOMEGA/V, respectively. A two-fluid analysis indicates that the changes in the surface impedance can be explained in terms of field induced changes in the superconducting carrier density of the top YBCO film.

引用

页码：3215 / 3217

页数：3

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