Field and dilution effects on the slow relaxation of a luminescent DyO9 low-symmetry single-ion magnet

Abstract

A mononuclear Dy(III) complex with a non-Schiff base compartmental ligand has been prepared and characterised by X-ray crystallography and ac magnetic susceptibility measurements. The complex exhibits SIM behaviour induced by dilution and/or magnetic field with two thermally activated relaxation processes.

Unprecedented magnetic relaxation via the fourth excited state in low-coordinate lanthanide single-ion magnets: a theoretical perspective

“…31,32 The computed g-tensor for the ground state KD of complex 2a shows axiality (g xx = 0.0383, g yy = 0.6381 and g zz = 16.1980) but lacks pure Ising nature. The computed g-tensors for both these complexes followed the general pattern observed for low-symmetry complexes (see ESI, † Tables S7 and S8).…”

Single molecule magnet of 2D Salen-type dysprosium coordination polymer

“…The non-superposition M vs H/T plots at different low temperatures show a rapid increase at low magnetic fields, and even at 2 K and 7 T the maximum magnetization value is 10.09 μ B , and far lower than the saturation value (2 × 10 μ B ) (Fig. 3 inset), indicating the presence of significant magnetic anisotropy and the population of low-lying excited states [15,16]. The temperature dependence of χ M − 1 obeys the Curie-Weiss law, χ M = C/(T − θ), over the whole temperature range with C = 25.63 cm 3 K mol −1 , and θ = −8.52, respectively (Fig.…”

Field-induced single-ion magnetic behaviour in a highly luminescent Er3+ complex

“…The obtained lifetime decay is best fitted with a dual exponential fit which gives a major lifetime of 0.279 ms whih is in agreement with the values expected for bulk powder [26], but it can be improved up to 0.86 ms [5] by diluting the complexes in order to minimize ion-ion interactions. Such dilution approaches the conditions in which [Er(F-TPIP)3] samples would be prepared for usage in quantum computing [12,27]. …”

“…There are some examples of lanthanide complexes where both luminescent emission and slow relaxation of the magnetization occur [11][12][13][14][15][16][17][18]. This configures these materials as multifunctional materials.…”