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ナノ磁性薄膜の基本物性解析に基づく磁気記録用磁性膜の高性能化に関する研究

机译:基于纳米磁性薄膜基本物理性质分析的高性能磁记录磁性膜研究

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摘要

For realizing perpendicular magnetic recording (PMR) media for hard disk drives, precisely controlled fabrication on the single nanometer scale in accordance with the required properties is essential in terms of deriving the physical properties of materials. PMR medium presently consists of three functional parts; a soft magnetic underlayer (SUL), a nonmagnetic intermediate layer (NMIL),and a recording layer (RL). Controlling the interlayer coupling induced by the RKKY-like interaction appearing in CoFe-based amorphous films in SUL, introducing stacking faults in host face centered cubic materials to induce uniaxial crystalline symmetry for NMIL, and realizing a high uniaxial magnetocrystalline anisotropy constant for hexagonal closed packed CoPt grains with magnetically decoupling in RL are indispensable for advanced PMR media with high signal-to-noise ratio and thermal stability. In this paper, the material guide for SUL, NMIL and RL in current PMR media is reviewed in connection with specificity of nanostructure peculiar to a sputtering film.
机译:为了实现用于硬盘驱动器的垂直磁记录(PMR)介质,在获得材料的物理特性方面,根据所需的特性在单纳米级进行精确控制的制造至关重要。目前,PMR介质包含三个功能部分:软磁性底层(SUL),非磁性中间层(NMIL)和记录层(RL)。控制由SUL的CoFe基非晶膜中出现的类似RKKY相互作用引起的层间耦合,在主面中心立方材料中引入堆垛层错,以诱导NMIL的单轴晶体对称性,并为六角形密堆积实现高单轴磁晶各向异性RL中具有磁性去耦功能的CoPt晶粒对于具有高信噪比和热稳定性的高级PMR介质是必不可少的。在本文中,结合溅射膜特有的纳米结构的特异性,对当前PMR介质中SUL,NMIL和RL的材料指南进行了综述。

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