cryogen-free superconducting magnet

我们正在申请超导电磁磁铁。最大磁场应至少为15t，磁体也应无低温，以保证运行的可持续性和运行成本保持有限。特别值得注意的是，所应用的磁体具有相对较大的可变温度插入孔，这使得现有的测量方法得到优化和扩展，以及首次开发和使用新的测量方法。后者的重点将放在组合测量方法上，其中将两个独立的物理测量结合起来或在外部影响下测量物理性质。其中，我们将开发以下新的测量方法：低温和高磁场下的远红外测量。利用这种方法，我们将详细地研究单分子磁体和分子量子比特中的自旋声子耦合。此外，我们将在太赫兹辐射的影响下进行电输运测量。在此方法的帮助下，我们将一方面研究二维材料中载流子的量子特性，另一方面利用电探测磁共振波谱研究有机半导体中的电荷输运机制。最后，大孔径还将允许我们已经广泛使用的太赫兹电子自旋共振光谱（THz- esr）方法扩展样品转换器，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.