Pushing the limits of magnetic anisotropy in trigonal bipyramidal Ni(ii).

ABSTRACT: Monometallic complexes based on 3d transition metal ions in certain axial coordination environments can exhibit appreciably enhanced magnetic anisotropy, important for memory applications, due to stabilisation of an unquenched orbital moment. For high-spin trigonal bipyramidal Ni(ii), if competing structural distortions can be minimised, this may result in an axial anisotropy that is at least an order of magnitude stronger than found for orbitally non-degenerate octahedral complexes. Broadband, high-field EPR studies of [Ni(MDABCO)₂Cl₃]ClO₄ (1) confirm an unprecedented axial magnetic anisotropy, which pushes the limits of the familiar spin-only description. Crucially, compared to complexes with multidentate ligands that encapsulate the metal ion, we

SUBMITTER: Marriott KER 

PROVIDER: S-EPMC5508675 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature