GOALI: Advancement of Heat-Assisted Magnetic Recording Enabled by Time-Resolved Magneto-Optical Kerr Effect Metrology

GOALI：时间分辨磁光克尔效应计量技术推动热辅助磁记录的进步

• 批准号: 2226579
• 负责人: Xiaojia Wang
• 金额: $ 35.56万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2226579&HistoricalAwards=false
• 关键词: GOALI; Advancement; Heat; Assisted; Magnetic

Heat-Assisted Magnetic Recording (HAMR) holds great potential for extending the storage areal density of hard disk drives, which allows more information to be stored in a hard disk of the same physical size. HAMR uses a laser to temporarily heat the recording medium (the disk material) during writing, allowing the use of media with high thermal stability at tiny bit sizes with small grains. However, this thermally-controlled switching brings new thermal management challenges, which require careful consideration of aggressive heat dissipation in the HAMR design to ensure the high performance and extended lifetime of data storage systems. This GOALI project aims to explore the thermal and magnetic performance of HAMR materials for developing high-performance and high-areal density HAMR devices. The collaboration between the University of Minnesota and Seagate Technology will inspire interest in heat transfer, energy conversion, and hard disk drive technology across a broader audience. The project team will study the thermal and magnetic properties of thin-film samples made of HAMR materials, under systematically varied temperatures and external magnetic fields. Particularly, the team will focus on understanding the fundamental mechanisms of how temperature will affect the magnetization dynamics in HAMR materials and thus the magnetic switching processes, and vice versa. The outcomes of this project will not only address the critical thermal challenges that currently limit recording device performance and reliability, but also advance the fundamental understanding of carrier physics linking temperature and magnetization. Such an understanding will also be critical for improving thermal management in other giant magneto-resistive devices and potentially advancing the new magnetic sensor technology.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

热辅助磁记录（HAMR）在扩展硬盘驱动器的存储面密度方面具有巨大的潜力，其允许在相同物理尺寸的硬盘中存储更多的信息。HAMR使用激光在写入过程中暂时加热记录介质（磁盘材料），允许使用具有高热稳定性的介质，以微小的位尺寸和小颗粒。然而，这种热控开关带来了新的热管理挑战，需要在HAMR设计中仔细考虑积极的散热，以确保数据存储系统的高性能和延长的使用寿命。该GOALI项目旨在探索HAMR材料的热性能和磁性能，以开发高性能和高面密度的HAMR器件。明尼苏达大学与希捷科技公司之间的合作将激发更广泛受众对传热、能量转换和硬盘驱动器技术的兴趣。该项目团队将研究由HAMR材料制成的薄膜样品在系统变化的温度和外部磁场下的热性能和磁性能。特别是，该团队将专注于了解温度如何影响HAMR材料的磁化动力学的基本机制，从而影响磁开关过程，反之亦然。该项目的成果不仅将解决目前限制记录设备性能和可靠性的关键热挑战，而且还将推进对连接温度和磁化的载体物理的基本理解。这样的理解也将是至关重要的改善热管理在其他巨磁阻器件和潜在的推进新的磁传感器technology.This奖项反映了NSF的法定使命，并已被认为是值得的支持，通过评估使用基金会的智力价值和更广泛的影响审查标准。