站立式石墨烯嵌层结构的强磁阻效应产生原理与调控研究

项目名称： 站立式石墨烯嵌层结构的强磁阻效应产生原理与调控研究

项目编号： No.51305274

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 王超

作者单位： 深圳大学

项目金额： 28万元

中文摘要： 磁阻效应传感器在现代微机电系统中发挥着重要作用。由于其消耗了大量金属资源，亟需研制新型非金属磁阻效应器件。多层石墨烯由于边缘与缺陷处自旋极化引起的磁阻效应而得到极大关注，但目前尚未实现磁阻效应器件的原位制造。针对上述背景，本研究提出"站立式石墨烯嵌层结构的强磁阻效应产生原理与调控研究"这一科学问题，围绕石墨烯嵌层有序排列的磁阻效应起源，尺寸效应下磁阻效应的增强机制和多嵌层并联下磁阻效应的协同响应等三项内容开展研究。以电子照射诱导碳原子键合实现石墨烯嵌层站立生长，通过照射电子密度与能量，生长高度和掩模间距对其生长形态、层内尺寸和并联嵌层数量进行原位调控。利用电子自旋共振和拉曼光谱分析电子结构，探讨磁阻效应产生原理，利用物理特性测试系统分析磁致电阻变化，探索磁阻效应增强机制与调控原理。本研究旨在揭示站立式石墨烯嵌层结构的强磁阻效应产生原理，为新型石墨烯基磁阻效应器件设计提供科学基础。

中文关键词： 站立式石墨烯；电子照射；电子回旋共振等离子体；磁阻效应；传感器

英文摘要： Magnetoresistance effect devices are widely applied in electric navigating and magnetic field measurement, consuming a lot of metal resources since they are prepared from magnetic metallic films. Since graphene can generate magnetoresistance effect due to spin polarize at the edge defects, it has attracted much attentions, though the directly growth of graphene based 3-dimensional magnetoresistance device is not realized yet. Based on above background, this application proposed a scientific problem of "Originating Principles and Managing Research of Strong Magnetoresistance Effect in Standing-Up Graphene Sheet Embedded Carbon Structure", and tend to carry out studies in three aspects: magnetoresistance originating due to orderly arrangement of embedded graphene sheets, the enhancement of magnetoresistance due to size effect, and the response of parallel connected graphene sheets. The graphene sheets are vertically formed by low energy electron inducing, the graphene sheets stacking, in plane size and parallel connected number are modified by electron irradiation parameters, growth height and mask size. ESR and Raman spectra are introduced to study the electronic structure, thereafter the originating principles of strong magnetoresistance are proposed. PPMS is introduced to investigate the magnetoresistance value

英文关键词： standing-up graphene；electron irradiation；ECR plasma；magnetoresistance；sensor