Two C_2v symmetry dysprosium(iii) single-molecule magnets with effective energy barriers over 600 K

Abstract

Two mononuclear DyIII single-molecule magnets (SMMs) with C2v coordination symmetry were synthesized. Both of them have strong uniaxial magnetic anisotropy with high effective energy barriers for magnetization reversal over 600...

Understanding the magnetic anisotropy for linear sandwich [Er(COT)]+-based compounds: a theoretical investigation

“…A new method proposed by Aravena et al 31 to predict effective demagnetization barrier based on the same CASSCF/RASSI-SO calculations was also used for comparison. The theoretically predicted effective barrier as a function of temperature has the form: 31–34 …”

“…S5,† the M in the ground KDs are all smaller than 10 −5 μ B , and thus the QTMs in their ground KDs could be suppressed at low temperatures. 6,32 Table S8† lists wave functions with definite projection of the total moment | m J > for the lowest two or three KDs with different θ angles, where the ground KDs with θ ranging from 36.3° to 54.3° are all mostly composed by m J = ±15/2.…”

Magnetocaloric effect and slow magnetic relaxation in peroxide-assisted tetranuclear lanthanide assemblies

“…11 The intrinsic high spin of many lanthanide ions and their strong spin-orbit coupling make them attractive candidates for assembling single-molecule magnets. [12][13][14][15][16][17][18][19][20][21] Another aspect of interest in lanthanide complexes is molecular refrigeration which can be generated by the so-called magnetocaloric effect (MCE). It has been shown that the MCE can be maximized by the presence of metal ions that can contribute to a high spin and have negligible anisotropy.…”

Impact of Ligand Substituents on the Magnetization Dynamics of Mononuclear DyIII Single-Molecule Magnets

“…During the periods of pursuing high-performance SMMs and obtaining the magneto–structural correlations, we have studied the influence of magnetic exchange interactions on improving the blocking temperature in radical-bridged systems, the influence of guest solvent exchange in the pores of a metal–organic framework on the magnetization dynamics of Dy 2 -SMM nodes, , as well as the influence of terminal halogen ligands on the SMM behaviors . The key of these studies is to keep the main coordination structures unchanged but vary one specific structural factor, which is highly challenging in synthetic coordination chemistry.…”