Visiting Fellowship for Professor A. Taraphder: Theory of magnetism with temporal disorder applied to magnetically doped ZnO

我们需要了解一类新的磁性材料，磁性半导体，因为它们在一个叫做自旋电子学的新学科中具有非常高的潜力。这些材料有可能同时执行半导体处理数据和磁性存储数据的功能。添加少量过渡金属的基于ZnO的特定类别的化合物特别有前途，因为它们在室温下是铁磁性的。然而，有一个主要的难题：有时候，当加入更多的杂质时，磁性会增强，有时候磁性会消失。2在这个项目中，我们将研究是否有一种特殊的机制有效。理解磁体的这一方面将是朝着能够优化它们以用于自旋电子器件的非常重要的一步。这个项目是把一个优秀的印度物理学家，教授Taraphder，到谢菲尔德与领导人的主要英国小组工作的氧化锌，以解决这个问题。

We need to understand a new class of magnetic materials, magnetic semiconductors, because they have a very high potential in a new subject called spintronics. These materials have the potential to perform both the functions of a semiconductor to process data and a magnetic to store the data.The particular class of compounds based ZnO with a small amount of a transition metal added is particularly promising because they are ferromagnetic at room temperature.However there is a major puzzle: sometimes the magnetism is enhanced when more impurities are added and sometimes the magnetism goes away.In this project we shall investigate if a particular mechanism for this is valid. Understanding this aspect of the magnets will be a very important step towards being able to optimise them for use in spintronics devices. This project is to bring an excellent Indian physicist, Professor Taraphder, to Sheffield to work with the leader of the main UK group working on ZnO in order to solve this problem.