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

被引:38
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
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.
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收藏
页码:3215 / 3217
页数:3
相关论文
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