MEASUREMENTS OF TRANSPORT PROPERTIES AND NOISE POWER SPECTRAL DENSITIES FOR Bi2Sr2Ca1Cu2Ox SINGLE CRYSTALS

被引：4
|
作者：
Han, K. H. [1 ]
Joo, M. K. [2 ]
Shin, H. J. [2 ]
Lee, Sung-Ik [1 ,2 ]
Salk, Sung-Ho Suck [1 ,2 ]
机构：
[1] Pohang Inst Sci & Technol, Dept Phys, Pohang 790600, Kyung Buk, South Korea
[2] Res Inst Ind Sci & Technol, Div Basic Sci, Pohang 790600, Kyung Buk, South Korea
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1993年 / 3卷 / 01期
关键词：
D O I：
10.1109/77.234019
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We measured the current-voltage characteristics of Bi2Sr2Ca1Cu2Ox single crystals along the a-b plane and observed the behavior of Kosterlitz-Thouless(K-T) transition. Noise power spectral density, S,(f) near K-T transition temperature was studied in detail by changing the temperature, magnetic field, and current. We found that SA at temperatures above a K-T transition temperature Trr shows a 1/f behavior regardless of the external magnetic field. However near Tu, the S,(f) deviates markedly from the 1/f behavior for the experimental frequency range. We believe that the anomalous variation of frequency dependence near Tx,. originates from the fluctuation effect of the vortex-antivortex pairs, i.e. their annihilation-creation fluctuations.
引用
收藏
页码：2947 / 2949
页数：3
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