title: Cross correlation between the dipole-dipole interaction and the Curie spin relaxation: the effect of anisotropic magnetic susceptibility.
abstract: Cross-correlated relaxation caused by the interference of nuclear dipole-dipole interaction and the Curie spin relaxation (DD-CSR cross relaxation) is generalized to treat the case of anisotropic magnetic susceptibility, including the important case where the latter originates from zero-field splitting. It is shown that the phenomenon of DD-CSR cross relaxation is absolutely general and to be expected under any electronic configuration. The results of the generalization are presented for a model system, and the consequences for paramagnetic metalloproteins are illustrated with an example of cerium(III)-substituted calbindin. The effects of the magnetic anisotropy are found to be substantial.
authors.affiliation: CERM and Department of Chemistry, University of Florence, Via L. Sacconi, 6, I-50019 Sesto Fiorentino, Italy.
authors.forename: I
authors.initials: I
authors.lastname: Bertini
authors.forename: J
authors.initials: J
authors.lastname: Kowalewski
authors.forename: C
authors.initials: C
authors.lastname: Luchinat
authors.forename: G
authors.initials: G
authors.lastname: Parigi
mesh_terms: D016880:Anisotropy; D004578:Electron Spin Resonance Spectroscopy; D008433:Mathematics