Abstract
The transverse and longitudinal relaxation rates 1/T 2 and 1/T 1 of 5 5 Mn in molecular cluster magnet Mn 1 2 Ac have been measured at low temperatures. Both of 1/T 2 and 1/T 1 exhibit remarkable decreases with decreasing temperature and with increasing field, with the relative relation like T 1 /T 2 200. We adopt a simple model that the thermal fluctuation of the cluster spin S = 10, which is associated with the spin-phonon interactions, is only due to the excitation to the first excited state from the ground state with the average lifetimes τ 1 and τ 0 (τ 0 »τ 1 ). We show that 1/T 2 is interpreted in terms of the strong collision regime as given by 1/τ 0 , and that 1/T 1 is understood by the high-frequency regime based on standard perturbation treatment for the step-wise fluctuating field, thus being proportional to 1/τ 0 ω 2 N .
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
