A highly sensitive reversible and nonvolatile hybrid photoconductive/magneto-optic storage material

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Abstract
The optical recording sensitivity of magneto‐optic memory materials can be greatly enhanced by combining their physical stability and reversibility with the high optical sensitivity of certain photoconductors. Feasibility experiments have been performed on a magneto‐optic–photoconductor sandwich (called MOPS) of a liquid‐phase epitaxial ferrimagnetic garnet film at its magnetic compensation temperature covered by a Cu‐doped CdS temperature covered by a Cu‐doped CdS film and electrodes. Using a HeNe laser a recording sensitivity, referred to 1% read‐out efficiency, of better than 1 μJ/mm2 % at magnetic switching fields 6 switching events have not degraded the performance of MOPS.