Controlled transparencies based on magnetic crystals

Abstract

A study was made of the possibility of using magnetooptic materials (single-crystal orthoferrite plates cut normally to the optic axis and epitaxial bismuth-substituted garnet films) as media in controlled transparencies (page composers). Such use was based on the magnetooptic characteristics and technologically induced hysteresis of these materials. An investigation was made of the optical parameters, required control power, and dynamic properties. An optical contrast exceeding 350:1 and a total optical efficiency > 10% were achieved. The switching current was less than 1 A. The switching time of a transparency element depended on the material used and control current, and was within the range 10~MO-8 sec.

Bulk Single-Crystal Growth of Ce/Gd3(Al,Ga)5O12 from Melt without a Precious Metal Crucible by Pulling from a Cold Container

“…Thus, it ensures a high-temperature gradient over the melt surface. Several approaches have been proposed to ensure this, including using an additional thermal metal shield inside the melt, constructing a ceramic hot zone, and subjecting the melt surface to additional radiative heating . In this study, we combined two other approaches.…”

The Second-Order Spin-Reorientation Phase Transition in Thin Magnetic Film

“…These researches are very actual. Firstly, SRPT can be used in the thermomagenetic records in the point of spin reorientation [1]. Secondly, a lot of physical quantities (thermal capacity, magnetic susceptibility, Young modulus, decay factor, etc.)…”