RIA: Homogenization of Magneto-Optic Properties in MnBiA1 Films Through the Introduction of Nanoscale Artifical Polycrystallinity

本研究的主要目的是：1)了解A1的添加对MnBi薄膜微观结构均匀化的作用；2)探索这些薄膜的纳米尺度图图化的应用，通过抑制亚稳低温相的形成和减小有效晶粒尺寸来进一步改善薄膜的均匀性。这些目标解决了将MnBi作为蓝色激光波长超高密度磁光记录介质的主要障碍，即介质噪声和稳定性。这项技术，如果实现，可以为数字图像和视频应用提供无处不在的低成本可移动和可重写的光学媒体。更广泛地说，这项研究将有助于在几十纳米尺度上控制多晶薄膜的性能，通过应用纳米尺度的薄膜图像化技术来制造“人工多晶性”。这种控制对于多晶存储介质在超高密度（1Gbit/in2）磁记录、非易失性铁电存储器、可重写光存储器和利用高介电常数多晶氧化物进行电荷存储的动态随机存取存储器（DRAM）中的持续应用至关重要。＊＊＊

9409730 Sands The principal objectives of the proposed research are i) to understand the role of A1 additions in homogenizing the microstructure of MnBi thin films and ii) to explore the application of nanoscale patterning of these films to further improving film homogeneity through suppressing the formation of a metastable low-temperature phase and reducing the effective grain size. These objectives address the primary obstacles, media noise and stability, in developing MnBi as a medium for ultra-high density magneto-optic recording at blue laser wavelengths. This technology, if realized, could offer ubiquitous access to low-cost removable and rewritable optical media for digital image and video applications. More generally, the proposed research will contribute to advances in the control of polycrystalline thin-film properties on the scale of tens of nanometers through the application of nanoscale film patterning techniques to fabricate "artificial polycrystallinity." Such control will be essential to continued application of polycrystalline storage media for ultra-high density(1Gbit/in2) magnetic recording, nonvolatile ferroelectric memories, rewritable optical storage and Gbit dynamic random access memories (DRAM) utilizing high permittivity polycrystalline oxides for charge storage. ***