稀土单分子磁体研究进展

Recent Progress of Rare-Earth Single-Molecule Magnets

单分子磁体是一类纳米尺度的磁性材料,在高密度信息存储、量子比特和自旋电子器件等方面具有潜在的应用价值而备受关注。由于稀土离子具有大的磁矩和强的磁各向异性,稀土离子在高性能单分子磁体构筑方面有过渡金属离子不可比拟的优势。近年来,以单核和双核稀土单分子磁体为代表的稀土单分子磁体的研究取得了长足的进展,尤其是突破了以液氮沸点温度(77 K)为界限的磁阻塞温度,为室温下的单分子信息存储迈出了坚实的一步。

Single-molecule magnets(SMMs) are a class of nano-scale magnetic materials, and have attracted much attention due to the potential applications in high-density information storage, quantum qubits and molecular spintronic devices. Owing to the large magnetic moment and strong magnetic anisotropy, some rare-earth ions have incomparable advantages over transition metal ions in the construction of high-performance SMMs. In this review, the recent progress in rare earth SMMs represented by mononuclear and dinuclear complexes were high lighted, especially for the break through of the magnetic blocking temperature over the boiling point temperature of liquid nitrogen(77 K), which lays a solid foundation for futuristic single-molecule information storage at room temperature.