中国物理B ›› 1994, Vol. 3 ›› Issue (3): 176-181.doi: 10.1088/1004-423X/3/3/003
张道范, 朱镛, 杨华光, 马文漪, 顾本源
ZHANG DAO-FAN (张道范), ZHU YONG (朱镛), YANG HUA-GUANG (杨华光), MA WEN-YI (马文漪), GU BEN-YUAN (顾本源)
摘要: In this paper the influence of γ-radiation on the dielectric constants of Rb2ZnCl4 crystal at incommensurate-commensurate phase transition (hereafter abbreviated as INC-C transition) are studied. The thermal hysteresis occurs upon both cooling and heating runs, irrespective of whether the samples have been treated with γ-radiation or not. For the γ-irradiated sample, its transition point, Tc, between the INC and C phases is not changed, but the peak value of the dielectric constant at Tc increases abruptly, compared with that before γ-irradiation, When this sample is annealed at 40℃, the peak value restores to the incipient value for the sample free from γ-irradiation. The origin of the phenomenon of the thermal hysteresis of the dielectric constant may be due to the pinning effect of dejects or impurities in the samples.
中图分类号: (γ-ray effects)