After Effect of the Domain Motion in Rochelle Salt Crystal
1957; Physical Society of Japan; Volume: 12; Issue: 5 Linguagem: Inglês
10.1143/jpsj.12.477
ISSN1347-4073
Autores Tópico(s)Nonlinear Optical Materials Research
ResumoAfter 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: \begin{aligned} f(t){=}1-e^{-{\alpha}t} \end{aligned} 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.
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