CAREER: Fundamental Electrical and Thermal Limitations of Patterned Thin Film Multilayer Magnetic Field Sensors

职业：图案化薄膜多层磁场传感器的基本电学和热学限制

• 批准号: 9702419
• 负责人: Susan Burkett
• 金额: $ 20万
• 依托单位: University of Alabama Tuscaloosa
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-06-15 至 2001-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9702419&HistoricalAwards=false
• 关键词: CAREER; Fundamental; Electrical; Thermal; Limitations

9702419 Burkett Advances in magnetic materials research have had a remarkable impart on the data storage industry in the last decade. As the demands for faster operation and increased density intensify, it is clear that device dimensions must be reduced. Future increases in density will require radical new developments. However, the advent of any new major technology brings with it a wide variety of technical problems. In the case of magnetoresistive (MR) field-sensing devices, a number of these problems are materials related. One such problem, receiving surprisingly little attention, is that of electromigration. Other problems of interest in the application of MR technology are the origins of electrical noise and of thermally induced spurious output signals. An improved microscopic understanding of the failure modes of electronic conduction in magnetic multilayers of small dimensions that may be used in magnetoresistive sensing devices has vast technological implications. Additional studies include investigation of thermal integrity of patterned multilayers, and a special multilayer structure, the "spin-valve" as well as signal to noise ratio (SNR) measurements on patterned multilayers for evaluation of the relationship between noise, microstructure, and absolute physical size of field-sensing elements. The primary objectives in the proposed career development plan include: development of photolithographic techniques for magnetic materials, the study of electromigration effects under high current densities, evaluation of related thermal degradation effects in magnetic multilayers, noise measurements in mesoscopic multilayers, integration of research topics to the engineering curriculum, creation of research projects to aid in educating undergraduate/graduate students, and provision of adequately trained engineers for placement in the magnetics industry. ***

在过去的十年里，伯克特在磁性材料研究方面的9702419项进步对数据存储行业产生了显著的影响。随着对更快操作和更高密度的需求的加剧，显然必须减小器件尺寸。未来密度的增加将需要激进的新发展。然而，任何新的重大技术的出现都会带来各种各样的技术问题。在磁阻(MR)场敏器件的情况下，这些问题中的许多都与材料有关。其中一个令人惊讶的问题是电迁移，但很少受到关注。MR技术应用中感兴趣的其他问题是电噪声和热致杂散输出信号的来源。对小尺寸磁性多层膜中电子传导失效模式的改进微观理解可能用于磁阻传感设备，具有广泛的技术意义。其他研究包括研究图案化多层膜的热完整性，以及一种特殊的多层膜结构、“自旋阀”以及图案化多层膜上的信噪比(SNR)测量，以评估噪声、微结构和场敏元件的绝对物理尺寸之间的关系。拟议职业发展计划的主要目标包括：开发磁性材料的光刻技术，研究高电流密度下的电迁移效应，评估磁性多层膜的相关热退化影响，介观多层膜的噪声测量，将研究课题纳入工程课程，创建研究项目，以帮助培养本科生/研究生，以及为磁性行业的安置提供训练有素的工程师。***