Domain wall dynamics in ferroelectric/ferroelastic molybdates

Abstract

The effects of electrical field and mechanical stress on domain wall motion have been quantitatively determined for gadolinium molybdate (GMO) and similar compounds. The ratio of the stress driven wall mobility μ_τ to the electrical field driven wall mobility μ_E is shown to be equal to the ratio of the spontaneous strain γ₀ to the spontaneous polarization P₀ and to have the numerical value 1.53×10⁴ cm²/C. The dynamics of domain wall motion in GMO are discussed in relation to the crystal structure of this material.