Holographic memory is a strong candidate for next‐generation optical storage with high recording densities and data transfer rates, and magnetic hologram memory using a magnetic garnet, as the recording material, is expected to be used as a rewritable and stable storage technology. We succeeded in recording and reconstruction of two‐dimensional data in magnetic hologram without error. However, the diffraction efficiency is insufficiently high for actual storage devices. To increase the diffraction efficiency, it is important to record deep magnetic fringes, whereas the merging of fringes due to the excess heat near the medium surface generated during the thermomagnetic recording process must be suppressed. To avoid this merge of fringes, we proposed a multilayered structure in which the magnetic layers are divided by the transparent heat dissipation layers (HDL) to control the heat diffusion. In this study, we propose a simple thermal design method for designing the HDL multilayer structure. Using this model, we designed and fabricated an HDL multilayer medium in which the recording magnetic layers are discrete in the film. The HDL multilayer medium exhibited diffraction efficiency higher than that of the single‐layer medium, and error‐free recording and reconstruction were achieved using the magnetic assist technique.

中文翻译：

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磁全息存储器散热多层介质的开发

全息存储器是具有高记录密度和数据传输速率的下一代光学存储的理想选择，并且以磁性石榴石作为记录材料的磁性全息存储器有望用作可重写且稳定的存储技术。我们成功地在磁全息图中记录和重建了二维数据，而没有出现错误。然而，对于实际的存储设备，衍射效率不够高。为了提高衍射效率，重要的是记录深磁性条纹，而必须抑制由于在热磁记录过程中在介质表面附近产生的过多热量而导致的条纹合并。为避免这些条纹合并，我们提出了一种多层结构，其中磁性层被透明散热层（HDL）分开以控制热扩散。在这项研究中，我们提出了一种用于设计HDL多层结构的简单热设计方法。使用此模型，我们设计并制造了HDL多层介质，其中记录磁层在膜中是离散的。HDL多层介质显示出的衍射效率高于单层介质，并且使用磁辅助技术实现了无差错的记录和重建。我们设计和制造了一种HDL多层介质，其中记录磁性层在薄膜中是离散的。HDL多层介质显示出的衍射效率高于单层介质，并且使用磁辅助技术实现了无差错的记录和重建。我们设计和制造了一种HDL多层介质，其中记录磁性层在薄膜中是离散的。HDL多层介质显示出的衍射效率高于单层介质，并且使用磁辅助技术实现了无差错的记录和重建。