Modulating the magnetic relaxation of lanthanide-based single-molecule magnets

Abstract

In the area of molecular magnetism, single molecule magnets (SMMs) containing lanthanide elements are of immense scientific and technological interest because of their large energy barriers and high measured hysteresis temperature. Although there has been significant progress in the synthesis and characterization of lanthanide-based SMMs, there are still challenges, for instance, how single-ion anisotropy of lanthanide elements can be exploited, and how zero-field tunneling of magnetization can be suppressed. This article is devoted to the progress in various methodologies for modulating magnetic relaxation, especially in terms of crystal field and magnetic interactions. The crystal field plays a dominant role in creating single-molecule magnets with largely anisotropic f-elements, while the strong coupling between magnetic centers is able to suppress quantum tunneling of magnetization efficiently. lanthanide, single-molecule magnets, relaxation dynamics, quantum tunneling, magnetic coupling Citation:Zhang P, Zhang L, Xue S F, et al. [24]. These systems may hold the key to obtaining high anisotropic barrier single-molecule magnets (SMMs).Because of the effective shielding of the 4f electrons by the outer 5s 2 and 5p 6 shells of the Xe core, lanthanide ions are characterized by large unquenched orbital angular momentum, with the spin-orbit coupled ground state of 2S+1 L J

Dinuclear Coordination Compounds Based on a 5-Nitropicolinic Carboxylate Ligand with Single-Molecule Magnet Behavior

“…Research on these lanthanide-based SMMs keep attracting the increasing attention because of their potential applications in the field of high-density information storage, spintronic devices, and quantum computing . Because of this incremented interest, different materials are being constructed based on this metal ion with the aim to study the slow relaxation of the magnetization and magnetic hysteresis . In these systems, the large intrinsic magnetic anisotropy and the large number of unpaired f-electrons of lanthanide metal ions can contribute to increase the energy barrier of magnetization.…”