Microwave complex conductivity of the YBCO thin films as a function of static external magnetic field

被引：8
|
作者：
Krupka, J. [1 ]
Judek, J. [2 ]
Jastrzebski, C. [2 ]
Ciuk, T. [1 ]
Wosik, J. [3 ,4 ]
Zdrojek, M. [2 ]
机构：
[1] Warsaw Univ Technol, Inst Microelect & Optoelect, PL-00662 Warsaw, Poland
[2] Warsaw Univ Technol, Fac Phys, PL-00662 Warsaw, Poland
[3] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA
[4] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA
来源：
APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 10期
关键词：
SURFACE-RESISTANCE; TEMPERATURE;
D O I：
10.1063/1.4868305
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A sapphire rod resonator operating at microwave frequencies was used to determine the electric properties of 600 nm thick YBCO films in the superconducting state. The rigorous electromagnetic modelling was applied to transform the measured Q-factor and the resonant frequency to the complex conductivity of high accuracy, which was previously shown to describe the intrinsic properties of superconductor thin films in more precise manner than the complex impedance. Static external magnetic field induces typical transition to normal state due to introduction of magnetic vortices into the sample. Observed magnetic hysteresis has the origin in the strong temperature dependent pinning. Additional energy absorption at about 1.5T was observed. (C) 2014 AIP Publishing LLC.
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页数：4
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