[1] PUSAN NATL UNIV,DEPT PHYS,PUSAN 609735,SOUTH KOREA
来源:
PHYSICA C
|
1997年
/
279卷
/
1-2期
关键词:
AC susceptibility;
high-T-c superconductors;
activation energy;
D O I:
10.1016/S0921-4534(97)00161-5
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
The AC susceptibilities of a polycrystalline HgBa2Ca2Cu3O8+delta sample were measured as a function of temperature, magnetic field and frequency. The activation energy, obtained from an Arrhenius plot for the frequency f and the maximum temperature T-p in the imaginary part chi '' of the AC susceptibility, was approximated by U(H,T) approximate to A(1 - T/T-c)H-0.15 for temperature and field. The maximum field H-p in the imaginary part chi '' exhibited the power-law dependence (1 - T/T-c)(5) for the temperature range near T-c. (C) 1997 Elsevier Science B.V.