標題: | NONLOGARITHMIC MAGNETIC-RELAXATION IN A HIGHLY ORIENTED BI-BASED SUPERCONDUCTING TAPE |
作者: | WEI, JC HORNG, L YANG, TJ CHEN, K 電子物理學系 光電工程學系 Department of Electrophysics Department of Photonics |
公開日期: | 1-十二月-1993 |
摘要: | Magnetic Relexation was studied at a wide range of temperatures and magnetic fields for a Ag-sheathed Bi-based superconducting tape with highly-c-axis orientation and high critical current density (J(c) > 10(4) A/cm2 at 77 K and 0 T). Under certain conditions, it is found that the magnetization data varies nonlinearly with ln(t) for entire period of time (t > 10(4) s). The curves can be divided into two relaxation rate (dM/dln(t)) in different period of time. It was observed that the lower the temperature is, the higher the magnetic field needs to bend a logarithmic line into a curve with two different relaxation rate (dM/dln(t)) in different region of time. The diagram of temperature and magnetic field was obtained from the experiment. |
URI: | http://hdl.handle.net/11536/2762 |
ISSN: | 0577-9073 |
期刊: | CHINESE JOURNAL OF PHYSICS |
Volume: | 31 |
Issue: | 6 |
起始頁: | 1215 |
結束頁: | 1219 |
顯示於類別: | 會議論文 |