Enhancing the barrier height for Yb(<scp>iii</scp>) single-ion magnets by modulating axial ligand fields
Aditya Borah, Sourav Dey, Sandeep K. Gupta, Mrinalini G. Walawalkar, Gopalan Rajaraman, Ramaswamy Murugavel
Abstract
The effect of systematic modification of the axial ligand field X on Ueff values in Yb(iii)-based SIMs, [Yb(Ph3PO)4X2]X' (X, X' = NO3 (1), OTf (2) and X = I/Br/Cl; X' = I3 (3)), whose equatorial Ph3PO ligation remains unchanged, has been investigated. Combined magnetic studies coupled with ab initio calculations reveal weakening of the axial ligand fields leading to the increase in the energy barrier, apart from suggesting the operation of different relaxation pathways.
Topics & Concepts
IonMagnetLigand (biochemistry)Materials scienceChemical physicsAtomic physicsChemistryNanotechnologyPhysicsReceptorBiochemistryQuantum mechanicsOrganic chemistryMagnetism in coordination complexesLanthanide and Transition Metal ComplexesAdvanced NMR Techniques and Applications