After Effect of the Domain Motion in Rochelle Salt Crystal

抄録

After effect of the domain motion in rochelle salt crystal was observed for several hours. Quasi-static f–E hysteresis loop was obtained, where f is the fraction of the domain saturated in one direction to the total volume of the crystal. Comparing this with P–E hysteresis loop at 50 cps, differences are remarkable. A.c. hysteresis loop has shallow sloping sides and high coercivity, while quasi-static f–E hysteresis loop is almost square and shows much lower coercivity. f is time dependent and can be expressed in the formula:
f(t)=1−e^−αt
where time constant 1/α is about one hour for critical field about 60 v/cm, in the sample of thickness 0.6 mm at 10°C.