标题： 冷凝物中超流纳米液滴中多原子分子的斯特恩-格拉赫偏转 显示英文标题

标题： Stern-Gerlach deflection of cryogenically cold polyatomic molecules in superfluid nanodroplets

摘要： 束偏转能够提供关于分子和团簇的磁矩以及它们自旋的弛豫动力学的有价值信息。 然而，由于多原子系统激发的振动和转动状态的磁耦合，观测受到了阻碍，这些状态难以控制、表征和系统化。 在本工作中，我们对掺杂有高自旋FeCl2和CoCl2分子及其复合物的超流氦纳米液滴进行了偏转测量。 这使得能够在所有自由度完全定义的极低温下定量确定分子和团簇的磁矩。 自旋磁矩在施加的磁场中达到热平衡并被取向。 发现二聚体和三聚体具有反铁磁有序性。 强调了在低温氦基质内分子自旋弛豫的速率和机制问题。 显示英文摘要

摘要： Beam deflection is capable of providing valuable information about the magnetic moments of molecules and clusters as well as the relaxation dynamics of their spins. However, observations have been hampered by magnetic couplings to excited vibrational and rotational states of polyatomic systems, which are challenging to control, characterize, and systematize. In this work, we carried out deflection measurements on superfluid helium nanodroplets doped with high-spin FeCl2 and CoCl2 molecules and their complexes. This enabled quantitative determination of the magnetic moments of molecules and clusters at extremely low, and fully defined, temperature of all of their degrees of freedom. The spin magnetic moments become thermalized and oriented along the applied field. Dimers and trimers are found to be antiferromagnetically ordered. The issue of rates and mechanisms of molecular spin relaxation within the cryogenic helium matrix is highlighted.