Hydroxide-bridged five-coordinate Dy^III single-molecule magnet exhibiting the record thermal relaxation barrier of magnetization among lanthanide-only dimers

Abstract

A hydroxide-bridged five-coordinate dysprosium(iii) dimer with short Dy–O bonds was synthesized.

Exchange‐Biasing in a Dinuclear Dysprosium(III) Single‐Molecule Magnet with a Large Energy Barrier for Magnetisation Reversal

“…For comparison, we could estimate the magnitude of the Ising exchange parameter by considering the system as a simple Ising dimer (which is a gross approximation due to the non‐collinearity of the main magnetic axes, see above), Equation , giving J Ising =−1.48 cm −1 where H cross is 800 Oe from the first derivative of the magnetisation, and g equals g 3 =19.87. We note that this suggests an exchange interaction that is an order‐of‐magnitude larger than the dipole‐only calculation [Eq.…”

Structure and Single‐Molecule Magnetic Property of a Dinuclear Dy2 Complex Bridged by the 4‐Methylpyridine N‐Oxide Ligand

“…The quantum tunnelling of magnetization (QTM) often observed in SMMs is generally responsible for the low U eff and T B , because the QTM process shortcuts the thermal relaxation barrier and eliminates the remnant magnetization in a typical hysteresis measurement. Compared with SIMs, dinuclear lanthanide SMMs with magnetic exchange coupling interactions have the advantage of suppressing QTM to enhance the SMM properties . And it has been verified that magnetic coupling between Dy III can suppress the quantum tunneling of magnetization effectively in the low‐temperature region .…”

Two Rare‐Earth Molecular Ferroelectrics with High Curie Temperatures, Large Spontaneous Polarization, Switchable Second Harmonic Generation Effects, and Strong Photoluminescence

“…Rare‐earth elements have unique fluorescent and magnetic properties, because they possess unique outer‐shell electronic structures enabling diverse charge transfer such as D→F, H→P, F→L, etc., and containing a number of unpaired f orbit electrons. Furthermore, they possess large atomic radii and usually exhibit diverse coordination modes; for example, the coordination number can vary from 6 to 14 in similar coordinating compounds, offering a wide stage for constructing all kinds of compounds .…”