Structure-Property Correlations in Electrochemically Deposited Co-Pt Alloy Films, Micro- and Nanostructures

电化学沉积 Co-Pt 合金薄膜、微米和纳米结构的结构-性能相关性

• 批准号: 0705042
• 负责人: Giovanni Zangari
• 金额: $ 30万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-01 至 2010-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0705042&HistoricalAwards=false
• 关键词: Structure; Property; Correlations; Electrochemically; Deposited

This project will contribute to progress in magnetic device technology by developing a fundamental scientific understanding of an electrochemical process for the synthesis of hard magnetic Co-rich Co-Pt alloy films, micro- and nanostructures. The research work will concentrate on growth phenomena at the substrate/electrolyte interface, the formation of microstructure, and the correlation between microstructure and magnetic properties in these materials. Particular attention will be devoted to the possibility that enhanced ad-atom dynamics at electrolyte interfaces might enable the synthesis of partly ordered structures at relatively low temperatures; the attendant implications on the possibility to grow oriented L10 equiatomic alloys (Co-Pt or Fe-Pt) by electrochemical methods will be explored. Magnetic properties of films and nanostructures will be investigated in detail, in view of possible applications of these materials in magnetic recording or as magnetic components in micro-electromechanical systems. Processing issues as they relate to these applications will be addressed. The intellectual merit of this work is in the development of a comprehensive scientific understanding of growth phenomena determining the microstructure and magnetic properties of Co-Pt electroplated alloys. Chemical, electrochemical and solid state phenomena leading to film growth will be addressed, and the resulting insight will be applied to improve the process at hand as well as to promote a better scientific understanding of electrochemical crystallization phenomena in general. In parallel, a detailed investigation of microstructure and magnetic properties will provide fundamental insight on the origin of the magnetic properties in Co-Pt films and structure, and on their behavior across different length scales. NON-TECHNICAL: Critical advancements in magnetic device technology will be made possible by the availability of simple and reliable processes for the micro-fabrication of hard magnetic materials. Successful development of a reliable process for the synthesis and micro-fabrication of hard magnetic materials would trigger critical advances in magnetic devices. Technology transfer will be facilitated through graduate internships and through the formation of students with experience and skills in electrochemical processing. Undergraduate internships in PI's laboratories, graduate internship in high-tech companies, and laboratory experiences in undergraduate courses, focused on electrochemical synthesis, will provide a series of activities to spread and promote knowledge and interest in electrochemistry and electrochemical processing, as well as generate expertise in the subject. The understanding of growth phenomena of the Co-Pt alloy system will provide the basis and stimulate the development of a scientific understanding of electrochemical growth processes in general. Graduate and undergraduate students involved in courses and in internships will develop an appreciation for the power and reach of electrochemical processes and phenomena, and will acquire uncommon but often required skills, useful in the high-tech job market.

该项目将通过发展对电化学过程的基本科学理解来促进磁性设备技术的进步，以合成硬磁性富钴钴铂合金薄膜、微结构和纳米结构。研究工作将集中在衬底/电解液界面的生长现象，微结构的形成，以及这些材料中微结构与磁性能之间的关系。将特别注意在电解液界面上增强的ad-原子动力学可能使在相对较低的温度下合成部分有序结构的可能性；随之而来的是探索通过电化学方法生长取向L10等原子合金(Co-铂或Fe-铂)的可能性。鉴于薄膜和纳米结构在磁记录或作为微型机电系统中的磁性元件的可能应用，将详细研究这些材料的磁性。与这些申请有关的处理问题将得到解决。这项工作的学术价值在于对决定钴-铂电镀合金微观结构和磁性的生长现象有了全面的科学理解。将讨论导致薄膜生长的化学、电化学和固态现象，并将应用由此产生的见解来改进手头的工艺，以及促进对电化学结晶现象的更好的科学理解。同时，对微结构和磁性的详细研究将从根本上洞察钴-铂薄膜和结构中磁性的来源，以及它们在不同长度尺度上的行为。非技术：磁器件技术的关键进步将通过可获得简单可靠的硬磁材料微制造工艺而成为可能。成功开发出一种可靠的硬磁材料合成和微细加工工艺，将推动磁性设备的重大进步。将通过研究生实习和培养具有电化学加工经验和技能的学生来促进技术转让。在PI实验室的本科实习、在高科技公司的研究生实习以及本科课程的实验室经历，重点是电化学合成，将提供一系列活动，传播和促进电化学和电化学加工的知识和兴趣，并产生该学科的专业知识。对Co-Pt系合金生长现象的理解将为科学理解电化学生长过程提供基础和推动。参与课程和实习的研究生和本科生将认识到电化学过程和现象的力量和影响范围，并将获得在高科技就业市场上有用的不常见但往往是必需的技能。