Magnetic Micro and Nano Wires

磁性微纳米线

• 批准号: 9523-2007
• 负责人: Yelon, Arthur
• 金额: $ 2.39万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=450498
• 关键词: Magnetic; Micro; Nano; Wires

Our research activities focus on the behaviour of metallic magnetic microwires and nanowires. The work on microwires focuses on giant magnetoimpedance, the extremely high (100s of %) changes in electrical impedance produced by small changes in magnetic fields. The response when the current is small is now reasonably well understood. We are working primarily on non-linear effects, and on the magnetic noise, which is the ultimate limitation on the application of these effects in sensors. The study of nanowire arrays is a relatively new field, and we have developed a simple picture of the interaction fields produced by the wires and acting on the others. Much remains to be understood concerning their domain structure and magnetic reversal processes. Their high frequency behaviour is of considerable interest. We are also working on the subject of multiexcitation entropy. This effect is important in kinetic processes, observed in chemistry, solid state physics, geology, and biology.

我们的研究活动集中在金属磁性微线和纳米线的行为上。微细导线的研究重点是巨磁阻抗，这是由磁场的微小变化产生的极高(100%)的电阻抗变化。电流很小时的反应现在已经相当清楚了。我们主要致力于研究非线性效应和磁噪声，这是这些效应在传感器中应用的最终限制。纳米线阵列的研究是一个相对较新的领域，我们已经绘制了一张简单的图像，展示了由纳米线产生的相互作用场以及对其他纳米线的作用。关于它们的磁区结构和磁反转过程，还有很多需要了解的地方。它们的高频行为引起了人们的极大兴趣。我们还在研究多激发态熵的问题。这种效应在化学、固体物理、地质学和生物学中观察到的动力学过程中很重要。