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Cross Correlation between the Dipole–Dipole Interaction and the Curie Spin Relaxation: The Effect of Anisotropic Magnetic Susceptibility

✍ Scribed by Ivano Bertini; Jozef Kowalewski; Claudio Luchinat; Giacomo Parigi

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 77 KB
Volume: 152
Category: Article
ISSN: 1090-7807
DOI: 10.1006/jmre.2001.2378

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✦ Synopsis

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.

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