Closed cycle SQUID magnetometer

在三个研究小组和几个项目(DFG、BMBF和EU)的框架内，将在未来几年开展关于薄膜、纳米颗粒和块体形式的磁性材料的广泛工作。重点放在它们的磁、电和热传输特性上，这些特性针对几个应用：热效应、磁形状记忆、生物医学应用的纳米颗粒、巨磁电阻传感器和隧道磁阻传感器、旋热电子学等。在磁性表征方面，工作组目前只使用为薄膜设计的磁强计，这使得对更大样品的测量变得困难。现有的磁强计和输运特性测量装置都超载。因此，在我们的基础设施中增加一种新的、高灵敏度的磁强计是极其重要的，这种磁强计具有足够的通用性，可以在所有计划的系统中进行测量。特别是，如果没有这种新的磁强计，新的磁能材料组就不能在研究方面取得进展，因为它主要处理大块样品。此外，新要求的系统将允许在相同条件下表征磁性和运输性质，这是研究小组目前没有的可能性，这将使磁性现象和运输现象之间能够联系起来。

Within the framework of three research groups and several projects (DFG, BMBF and EU), extensive work on magnetic materials in the form of thin films, nanoparticles and bulk will be carried out in the next few years. The focus is on their magnetic, electrical and thermal transport properties aiming at several applications: caloric effects, magnetic shape memory, nanoparticles for biomedical applications, giant and tunneling magneto resistive sensors, spincaloritronics, etc. For magnetic characterization, the working groups currently count only with a magnetometer designed for thin films, making measurements on larger samples difficult. Both the existing magnetometer and the transport properties measurement setups are overloaded. Therefore, it is extremely important that a new, highly sensitive magnetometer which is versatile enough to allow measurements in all the planned systems be added to our infrastructure. In particular, without this new magnetometer, the new group Magnetic Energy Materials cannot advance in its research since it deals chiefly with bulk samples. Moreover, the new requested system will allow for the characterization of magnetic and transport properties under the same conditions, a possibility that the research groups currently do not have and that will allow the connection between magnetic and transport phenomena.