A rare chloride-bridged dysprosium chain with slow magnetic relaxation: a thermally activated mechanism via a second-excited state promoted by magnetic interactions

Abstract

Magnetic interactions induced by chloride bridges promote the slow magnetic relaxation in a dysprosium chain to pass through the second-excited state.

Reversible Switching of Single-Molecule Magnetic Behaviour by Desorption/Adsorption of Solvent Ligand in a New Dy(III)-Based Metal Organic Framework

“…Furthermore, 4f ions contain various coordination geometries, most from six-to nine-coordination, which contribute to the design and adjustment of the structures ( Ruiz-Martínez et al, 2008 ; Song et al, 2012 ; Aulakh et al, 2015 ; Guo et al, 2017 ; Li et al, 2017 ; Wang et al, 2018 ). In addition, the quantum tunneling effect can be effectively suppressed by the weak couplings, especially weak ferromagnetic couplings, thereby improving energy barriers, in lanthanide MOFs ( Woodruff et al, 2013 ; Das et al, 2018 ; Ji et al, 2019 ). Therefore, lanthanide ions are well suited for constructing MOFs with SMM behaviour, in particular for those with magnetic switching effects.…”

Magnetic hysteresis and strong ferromagnetic coupling of sulfur-bridged Dy ions in clusterfullerene Dy2S@C82

“…Two of them have phenoxide bridges with FM coupling and J tot values of 15.0 and 11.4 cm −1 . 18 , 19 In the complex with vanilloyl bridges, the coupling is AFM and J tot is −11 cm −1 . 20 Table 2 shows that in EMF-SMMs the range of coupling constants can be several times larger.…”

“…17 , R = SiPh 3 ; {Dy 2 O 2 }-A is [Dy 2 (dbm) 2 (LH 2 ) 2 ]·H 2 O from ref. 18 (LH 3 = (1E,3E)-2-hydroxy-5-methylisophthalaldehyde dioxime, Hdbm = dibenzoyl-methane); {Dy 2 O 2 }-B is [Dy(L)Cl(CH 3 OH)] n from ref. 19 (H 2 L = N ′-(5-bromo-2-hydroxybenzylidene)pyrazine- N -oxide-carbohydrazide); {Dy 2 O 2 }-C is [Dy 2 (a’povh) 2 (OAc) 2 (DMF) 2 ] from ref.…”

Single-molecule magnet behaviour in a centrosymmetric dinuclear dysprosium(iii) complex: sequential differentiation of triple relaxation pathways

“…[13][14][15][16] However, magnetic behaviours of Dy-SMMs are extremely complicated and still poorly understood, and can be affected by many factors, such as magnetic anisotropy, spin-orbit coupling, magnetic interactions, crystalfield effects and so on. [17][18][19][20][21] Some of the Dy-SMM complexes show interesting double or multiple relaxation behaviour instead of single relaxation behaviour. Typically, double or multiple peaks in out-of-phase susceptibility (χ″ M ) are easily observed in complexes containing two or more crystallographically independent centres having different coordination environments.…”