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: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=389995
• 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丝和纳米线的行为。 在微丝上的工作集中在巨磁阻抗，由磁场的微小变化产生的电阻抗的极高（100%）的变化。 现在，我们已经相当好地理解了电流很小时的响应。 我们主要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，我们已经开发了一个简单的图片的相互作用领域所产生的线和其他人的行动。 关于它们的磁畴结构和磁反转过程还有许多问题有待了解。 它们的高频行为引起了相当大的兴趣。 我们也在研究多激发熵。 这种效应在化学、固体物理学、地质学和生物学中观察到的动力学过程中很重要。