基于协同调控合金相组成与磁各向异性的SmCo基薄膜性能与机理的研究

SmCo基永磁合金具有高磁各向异性能和优异的热稳定性，是未来高密度热辅助磁记录介质的理想候选材料。然而目前SmCo基薄膜相组成较复杂，且磁各向异性不易改变，制约了SmCo基合金薄膜性能的调控。同时关于薄膜晶化过程中相组成、晶粒取向度对磁性能和磁畴形成机理的研究甚少。针对上述的主要问题，本项目利用沉积气压以及外加磁场对溅射原子运动的影响效应，提出通过优化薄膜沉积参数，实现沉积态SmCo基薄膜相组成与晶粒生长取向可调，优化磁性能；拟通过添加中间层掺杂并利用外场诱导退火方式协同调控SmCo基薄膜的相组成、磁各向异性及热稳定性，探讨外场对合金相及晶粒取向度的影响规律；拟结合实验表征与微磁学理论分析，揭示SmCo基多元合金薄膜相组成、晶粒取向度对磁各向异性与性能的内在影响机理，为获得高密度磁存储介质提供指导，并探索新颖的物理现象与机制。本研究旨在为复合结构磁存储介质材料的发展奠定基础。

SmCo-based films are ideal candidates for future high-density thermal assisted magnetic recording medias due to their high magnetic anisotropy and excellent thermal stabilities. However, due to complex phase constituents and difficulty of changing magnetic anisotropy, it would be harmful to control the properties. Moreover, there is few investigation on relations among phase constituents and grain alignments with properties and domain formations. Based on above problems, in this project, we try to optimize the deposition parameters in order to control the constituents and grains’ growth, which are affected by deposition pressure and sputtered atoms’ movements; Coordinated controlling phase constituents, magnetic anisotropy and thermal stabilities via inserting intermediate layer and field induced annealing, together with exploring the influence of external field on alloy phases and preferred orientations; Combing experiment results and micromagnetic simulation analysis to reveal the mechanisms of constituents and grain alignments on magnetic anisotropy and properties, which can provide a guide to synthesis high-density magnetic recording media, explore novel physical phenomena and related mechanisms. This research provides fundamental to fabricate composite structured magnetic storage materials.