NIRT: Single Particle Per Bit Magnetic Information Storage

NIRT：每比特单粒子磁性信息存储

• 批准号: 0507050
• 负责人: Sara Majetich
• 金额: --
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-01 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0507050&HistoricalAwards=false
• 关键词: NIRT; Single; Particle; Per; Bit

The objective of this research is to demonstrate a new magnetic recording paradigm using current-induced switching, which combines the advantages of patterned media, and the potential for lower manufacturing costs. This will be the first demonstration of single grain recording, and the smallest nanostructures yet investigated for current-induced switching. The approach will use self-assembled nanoparticle arrays as etch masks for patterning thin film multilayers into arrays of single particle bits. A conducting atomic force microscope probe will be used in contact mode to electrically contact individual bits. Low current densities will be used to sense the state of the bit, while high current densities will be used for switching. The noise power spectrum as a function of the applied current will reveal how effectively the spin torque is transferred. Simulations will be used to clarify the underlying physics.This project will have broader impact in several areas. Two graduate students and several undergraduates will learn state-of-the-art techniques of nanoscale synthesis and fabrication, the use of scanning probe and electron microscopy for nanoscale structural characterization, and high sensitivity nanoscale transport measurement techniques. New science fair projects will be developed and the research of students in the Carnegie Mellon University/Milliones and Reizenstein Middle Schools Physics Concepts program will be supervised. Progress made in scanning probe-based recording, current-induced switching media, and the use of self-assembled structures for low cost, manufacturable nanopatterning will be significant for the magnetic recording industry.

本研究的目的是展示一种新的磁记录模式，使用电流感应开关，它结合了图案化介质的优点，并降低制造成本的潜力。这将是单颗粒记录的第一个演示，也是迄今为止研究电流诱导开关的最小纳米结构。该方法将使用自组装的纳米粒子阵列作为蚀刻掩模，用于将薄膜多层图案化为单个粒子位的阵列。一个导电的原子力显微镜探针将用于接触模式，以电接触个别位。低电流密度将用于感测位的状态，而高电流密度将用于切换。噪声功率谱作为所施加电流的函数将揭示自旋力矩如何有效地传递。模拟将被用来澄清基本的物理。这个项目将在几个领域产生更广泛的影响。两名研究生和几名本科生将学习最先进的纳米级合成和制造技术，使用扫描探针和电子显微镜进行纳米级结构表征，以及高灵敏度纳米级传输测量技术。将开发新的科学博览会项目，并监督卡内基梅隆大学/百万人和Reizenstein中学物理概念项目的学生的研究。在基于扫描探针的记录、电流感应开关介质以及用于低成本、可制造的纳米图案化的自组装结构的使用方面所取得的进展将对磁记录行业具有重要意义。