稀土配合物单分子磁体研究进展

摘要

Single-molecule magnets(SMMs) have potential application in the areas of ultrahigh-density memory components,spintronic devices and quantum computers. Rare earth ions are widely used for preparation of magnetic materials due to their high spin ground state as well as strong spin orbit coupling and magnetic anisotropy. In recent years,the rare earth ions have been used to improve SMMs spin flip energy barrier and a lot of rare earth complexes have been also synthesized. In this paper,the synthesis and structures of Lanthanide-based SMMs are briefly reviewed with an emphasis on magnetism properties of the mono-,di-,tri-,tetra-,penpa- and hexa-nuclear Lanthanide SMMs. Studies have showed that the SMMs made from Dysprosium-based complexes are the best and of the more the complex nuclear,the stronger the characteristics of SMMs. The future research of Lanthanide-based SMMs should focus on the synthesis of high nuclear complexes and the advancement of magnetic anisotropy energy barrier.%单分子磁体在超高密度存储、自旋电子器件、量子计算机等领域具有潜在的应用。稀土离子因其存在高电子自旋基态以及很强的自旋轨道耦合和磁各向异性，被广泛应用于磁性材料的制备。近年来，稀土离子用来提高单分子磁体的自旋翻转能垒的研究备受关注，大量具有单分子磁体性能的稀土配合物被合成。本文综述了稀土配合物单分子磁体的合成、结构与磁性研究进展，着重介绍了单核、双核、三核、四核、五核及六核稀土配合物单分子磁体的结构与磁学性质。研究表明，应用元素镝构筑的稀土配合物单分子磁体性能最好，且随着配合物核数的增加，单分子磁体的特性更加明显。展望稀土配合物单分子磁体的研究，今后的研究重点是合成高核稀土配合物和提高磁各向异性能垒。