Simulations of complex phenomena for applied magnetism

应用磁学复杂现象的模拟

• 批准号: 327779-2011
• 负责人: Plumer, Martin
• 金额: $ 1.09万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=572125
• 关键词: Simulations; complex; phenomena; applied; magnetism

The main purpose of my research is to gain deeper understanding of complex magnetic materials relevant for recording and storing information in computer hard drives. This will be accomplished through computer simulations, as well as theoretical investigations, using a variety of techniques developed by our group. A major influence on my research activity is on-going collaborations with hard-drive manufacturer Western Digital Corporation as well as with experimental groups at Memorial and Manitoba. An expansion of interactions with other groups in Canada and abroad is being facilitated by our newly formed organization, Magnetic North, which sponsors an annual workshop. In the proposed research, we will investigate the spontaneous decay of stored information in magnetic hard drives due to the thermal energy that occurs naturally within a computer at operating temperatures. This phenomenon, known as superparamagnetism, is one of the leading factors which limits hard-drive warranty periods. The development of new techniques to model this effect will help guide the technological innovations required to ameliorate its effects. Working closely with researchers from the industry will enhance the relevance of our efforts as well as the employment prospects for my students and postdocs. Other research focus areas involve studies of a variety of complex nanometer-dimensioned magnetic systems. This includes work done in collaboration with researchers at Manitoba on iron-oxide nanoparticles, the study of so-called 'anti-dot' patterned thin magnetic films that are formed by novel spin coating techniques at Memorial, as well as two-dimensional arrays of magnetic nano-wires which form 'magnonic lattices'. We will pursue on-going research to learn more about the dynamics in thin magnetic films and the complex magnetic order in coupled multi-layer thin films involved in magnetic transducer technology. I will also extend my efforts to reveal the underlying mechanisms responsible for novel magnetoelectric behavior in new materials that respond to both applied magnetic and electric fields that are being evaluated for technological applications.

我研究的主要目的是深入了解与计算机硬盘驱动器中记录和存储信息相关的复杂磁性材料。这将通过计算机模拟以及理论调查来完成，使用我们小组开发的各种技术。对我的研究活动产生重大影响的是与硬盘制造商西部数据公司以及纪念和马尼托巴的实验组正在进行的合作。我们新成立的组织“磁北”正在促进扩大与加拿大和国外其他团体的互动，该组织每年赞助一次讲习班。