Investigation of New Soft Magnetic Films for GHz Magnetic Recording Heads and Integrated Inductors

GHz 磁记录头和集成电感器用新型软磁薄膜的研究

• 批准号: 0096704
• 负责人: Shan Wang
• 金额: $ 28.95万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-15 至 2005-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0096704&HistoricalAwards=false
• 关键词: Investigation; New; Soft; Magnetic; Films

Soft magnetic films with low coercivity and high permeability are critical building blocks in numerous electromagnetic devices such as magnetic recording heads, integrated inductors (microinductors), integrated transformers, magnetic sensors, and micromachined motors. However, a lack of soft magnetic materials with a high saturation magnetization (20 kG), a large permeability (1000), and a large ferromagnetic resonance frequency (1 GHz), tends to be the bottleneck in these applications. For example, the data rate of hard disk drives is expected to be ~1 Gb/s (1 Gb = 1 billion bits) by year 2003. A data rate of 2 Gb/s corresponds to a recording frequencies of ~1 GHz, which exceeds the ferromagnetic resonance (FMR) frequency of most magnetic materials. Therefore, it is increasingly urgent to investigate new materials, magnetization dynamics, and recording physics which will enable magnetic recording at a frequency of 1 GHz. In this project, we propose the following: 1) Investigate a new soft magnetic material, namely Fe-Co-N films (FeCoN) with a saturation magnetization of ~24 kG, which will enable higher areal recording densities in hard disk drives (100 Gb per square inch). 2) Study magnetization dynamics and magnetic recording at 1 GHz, an important milestone if reduced to practice. 3) Evaluate the viability of the new FeCoN material for integrated inductors, which are desired for emerging applications such as portable wireless communication devices. 4) Educate graduate students and undergraduates about information storage technology via doctoral thesis research, research experience for under graduate (REU), and classroom teaching.

具有较低矫正性和高渗透率的软磁性膜是许多电磁设备（例如磁记录头，集成电感器（微电感器），集成的变压器，磁性传感器和微电动机）的关键构件。 但是，缺乏具有高饱和磁化（20千克），较大的渗透率（1000）和大铁磁共振频率（1 GHz）的软磁性材料往往是这些应用中的瓶颈。例如，到2003年，硬盘驱动器的数据速率预计为约1 GB/s（1 GB = 10亿位）。大多数磁性材料的数据速率为2 Gb/s对应于〜1 GHz的记录频率，超过了Ferromagnetic Resonance（FMR）频率。因此，研究新材料，磁化动力学和记录物理学越来越紧迫，这些物理学将使磁性记录以1 GHz的频率。在此项目中，我们提出以下内容：1）研究一种新的软磁性材料，即Fe-Co-N膜（FECON），其饱和磁化强度约为24千克，这将使硬盘驱动器的较高面积记录（每平方英寸100 GB）。 2）研究磁化动力学和在1 GHz处的磁记录，如果降低为实践，这是一个重要的里程碑。 3）评估用于集成电感器的新FECON材料的生存能力，这是针对新兴应用（例如便携式无线通信设备）的。 4）通过博士学位论文研究，研究生的研究经验（REU）和课堂教学，对研究生和本科生进行有关信息存储技术的教育。