Irregular ferroelectric element for controllable single domain

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...

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3401732, 350150, 350157, G02F 105

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039361462

ABSTRACT:
An element in which only a single domain-wall can move sidewise, having a crystal plate of an irregular ferroelectric which is cut in the Z-plane at opposite surfaces and is then cut or cleaved in the <110> direction at its periphery and transparent electrodes for the polarization reversal provided at the central portions of the opposite Z-planes. The element includes at least a domain configuration such that two nucleus regions of opposite polarities are disposed on opposite sides of the region, i.e., a domain having a stationary polarity, where the electrodes are provided.

REFERENCES:
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patent: 3521262 (1970-07-01), Paul
patent: 3559185 (1971-01-01), Burns et al.
patent: 3586415 (1971-06-01), Kumada et al.
Miller et al., "Velocity of Sidewise 180.degree. Domain-Wall Motion . . ." Phys. Rev. Vol. 112, No. 3, (Nov. 1, 1958), pp. 755-762.
Hill et al., "Optical Behavior of Domains in KH.sub.2 PO.sub.4 " Phys. Rev. Vol. 135, No. 6A, (Sept. 14, 1964), pp. A1640-A1642.
Shabana et al., "Electrooptical Activity of . . . Switched Domains . . ." Proc. IEEE Vol. 54, (Jan., 1966), pp. 85-86.
Land, "Ferroelectric Ceramic Electrooptic Storage and Display Devices" Sandia Corp., Reprint SC-R-67-1219 (Oct., 1967), pp. 17-20 & 42-44.
Bornarel et al., ". . . Evidence for . . . Interaction of Domains in Ferroelectric KH.sub.2 PO.sub.4 " J. App. Phys. Vol. 39, No. 9, (Aug. 1968), pp. 4339-4341.
Kumada, "Domain Switching in Gd.sub.2 (MoO.sub.4).sub.3 " Phys. Lett. Vol. 30A, No. 3, (Oct. 6, 1969), pp. 186-187.
Cummins, "Electrical, Optical, and Mechanical Behavior of Ferroelectric Gd.sub.2 (MoO.sub.4).sub.3 " Ferroelectrics Vol. 1, No. 1, (Mar., 1970), pp. 11-17.

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