Magnetic Micro and Nano Wires

我们的研究活动集中在金属磁性微线和纳米线的行为。微导线的研究重点是巨磁阻抗，即磁场的微小变化所产生的极高的电阻抗变化。当电流很小时的响应现在已经相当好地理解了。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相互作用场的图像线产生和作用于其他。它们的畴结构和磁反转过程仍有许多有待了解的地方。它们的高频行为引起了相当大的兴趣。我们也在研究多激励熵的问题。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是重要的。

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.