Modulation of the magnetic anisotropy of octahedral cobalt(ii) single-ion magnets by fine-tuning the axial coordination microenvironment

Abstract

The alteration of the axial N-donor ligands leads to two octahedral Co(ii) SIMs with varying easy-plane magnetic anisotropies and dynamic magnetic behaviors.

Tuning Magnetic Anisotropy in a Class of Co(II) Bis(hexafluoroacetylacetonate) Complexes

“…Notably, the ZFS parameters obtained from the ab initio calculations are greater than the experimental values from PHI fitting. This discrepancy may result from the fact that the real structures are more complicated than the modelled structures . Furthermore, significant E values were found in the four complexes with the E /| D | locating in the range of 0.005–0.188, which evidences the strong rhombicity of magnetic anisotropy in complexes 1 – 4 .…”

A new family of one-dimensional bromo-bridged Ir(iv)–Cu(ii) complexes based on the hexabromoiridate(iv) metalloligand

“…The n ≈ 4 value falls into the range typical of metal ions with relaxation through optical and acoustic Raman-like process, which suggests that only a phonon-bottlenecked direct process could not be operative in the relaxation dynamics of compound 1 . 42,43…”

Insertion of single-ion magnets based on mononuclear Co(ii) complexes into ferromagnetic oxalate-based networks

“…The values for the pre-exponential factor and activation energy are consistent with those of the other Co( ii ) complexes showing this behavior. 34–36…”