Slow magnetic relaxation in a pseudotetrahedral cobalt(II) complex with easy-plane anisotropy.
Chemical communications (Cambridge, England) 48:33 (2012) 3927-3929
Abstract:
A pseudotetrahedral cobalt(II) complex with a positive axial zero-field splitting parameter of D = 12.7 cm(-1), as determined by high-field EPR spectroscopy, is shown to exhibit slow magnetic relaxation under an applied dc field.Quantum tunneling of magnetization in trigonal single-molecule magnets
Physical Review B American Physical Society (APS) 85:1 (2012) 012406
EPR and magnetic quantum tunneling studies of the mixed valent [Mn4(anca)4(Hedea)2(edea)2]·2CHCl3, EtOH single-molecule magnet
Polyhedron Elsevier 30:18 (2011) 2965-2968
Accidentally on purpose: construction of a ferromagnetic, oxime-based [Mn(III)2] dimer.
Dalton transactions (Cambridge, England : 2003) 40:39 (2011) 9999-10006
Abstract:
The serendipitous self-assembly of the complex [Mn(III)(2)Zn(II)(2)(Ph-sao)(2)(Ph-saoH)(4)(hmp)(2)] (1),whose magnetic core consists solely of two symmetry equivalent Mn(iii) ions linked by two symmetry equivalent -N-O- moieties, provides a relatively simple model complex with which to study the magneto-structural relationship in oxime-bridged Mn(III) cluster compounds. Dc magnetic susceptibility measurements reveal ferromagnetic (J = +2.2 cm(-1)) exchange resulting in an S = 4 ground state. Magnetisation measurements performed at low temperatures and high fields reveal the presence of significant anisotropy, with ac measurements confirming slow relaxation of the magnetisation and Single-Molecule Magnetism behaviour. Simulations of high field, high frequency EPR data reveal a single ion anisotropy, D((Mn(III))) = -3.83 cm(-1). DFT studies on a simplified model complex of 1 reveal a pronounced dependence of the exchange coupling on the relative twisting of the oxime moiety with respect to the metal ion positions, as suggested previously in more complicated [Mn(III)(3)] and [Mn(III)(6)] clusters.Relieving frustration: The case of antiferromagnetic Mn3 molecular triangles
Physical Review B American Physical Society (APS) 84:9 (2011) 094443