cryogen-free superconducting magnet

我们正在申请超导螺线管磁体。最大磁场应至少为15 T。磁体也应该是无冷冻剂的，以便保证操作的可持续性并且操作成本保持有限。特别值得注意的是，所应用的磁体具有相对较大的变温插入孔，这使得现有的测量方法得以优化和扩展，并首次开发和使用新的测量方法。后者的重点将是组合测量方法，其中两个独立的物理测量相结合，或在外部影响下测量物理特性。除此之外，我们将开发以下新的测量方法：在低温和高磁场下的远红外测量。利用这种方法，我们将详细研究单分子磁体和分子量子比特中的自旋-声子耦合。此外，我们将进行太赫兹辐射的影响下的电输运测量。在这种方法的帮助下，我们将一方面研究2D材料中电荷载流子的量子特性，另一方面使用电检测磁共振光谱研究有机半导体中的电荷输运机制。最后，大口径还将允许我们已经广泛使用的THz电子自旋共振光谱（THz-ESR）方法通过样品交换器进行扩展，这将大大缩短必要的测量时间。

We are applying for a superconducting solenoid magnet. The maximum field should be at least 15 T. The magnet should also be cryogen-free, so that the sustainability of the operation is guaranteed and the operating costs remain limited. Particularly noteworthy of the magnet applied for is the relatively large bore of the variable temperature insert, which allows existing measurement methods to be optimized and expanded, as well as to develop and use new measurement methods for the first time. The focus of the latter will be on combined measurement methods in which two independent physical measurements are combined or physical properties are measured under external influences. Among other things, we will develop the following new measurement methods: Far-infrared measurements at low temperatures and in high magnetic fields. With this method we will investigate the spin-phonon coupling in single-molecule magnets and molecular quantum bits in detail. Furthermore, we will carry out electrical transport measurements under the influence of terahertz radiation. With the help of this method we will on the one hand investigate the quantum properties of charge carriers in 2D materials and on the other hand investigate the charge transport mechanism in organic semiconductors using electrically detected magnetic resonance spectroscopy. Finally, the large bore will also allow the THz electron spin resonance spectroscopy (THz-ESR) method that we have already extensively used to be expanded with a sample changer, which will considerably shorten the necessary measurement time.