单分子磁体自旋态的磁交换力显微镜研究

新的信息存储材料的研究推动相关科学技术的发展。在阻塞温度下出现磁滞行为的单分子磁体的检测与调控是其中的研究热点。一般的研究多采用低温扫描隧道显微镜进行。本项目创新性地提出以磁交换力显微镜为主要研究手段，从而避免了金属基底对单分子磁体的干扰。我们计划利用分子束外延方法在基底上沉积得到单个磁性分子或者自组装薄膜，通过探测针尖和样品之间的相互作用，并结合单分子操纵技术，对其自旋状态和吸附行为进行表征，进而探索通过自旋极化的针尖对其进行调控的方法。该工作丰富了单分子磁体的研究手段，为其实际应用奠定了基础。

Research in new materials for information storage advances the related science and technology. The detection and manipulation of single-molecule magnets, which exhibit magnetic hysteresis loop at low temperature, is a new frontier for information technology. In this project, we propose the study of single magnetic molecules using magnetic exchange force microscopy for the first time. Single molecules and their self-assembled films are prepared on surfaces by molecular beam epitaxy technique. The spin states and spin-selective adsorption of molecules are characterized by the interaction between tip and molecules. Controllable and reversible switching methods will also be explored. This work will enrich the study of spin states of single molecules and open new avenue for the practical application of single-molecule magnets.