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Title: Nuclear spin relaxation due to motion on inequivalent sites: H diffusion on O and T sites in the face-centred cubic structure
Contributor(s): Luo, Xinjun (author); Sholl, Colin (author)
Publication Date: 2003
DOI: 10.1088/0953-8984/15/6/320
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Abstract: Magnetization recoveries for nuclear spin relaxation of like spins due to magnetic dipolar coupling and diffusion on inequivalent sites involve a sum of exponentials. The theory is applied to diffusion on octahedral and tetrahedral interstitial sites in the face-centred cubic structure. Monte Carlo simulations have been used to generate relaxation data for parameters typical for H in metals. It is found that only a single exponential would be observable in the high- and low-temperature limits, but that two-exponential recoveries could be observable in the vicinity of the maximum in the relaxation rate as a function of temperature. The Monte Carlo relaxation data has been fitted using a Bloembergen–Pound–Purcell (BPP) model to assess the accuracy of the BPP model.
Publication Type: Journal Article
Source of Publication: Journal of Physics - Condensed Matter, 15(6), p. 937-944
Publisher: IOP Publishing Ltd
Place of Publication: Bristol, England
ISSN: 0953-8984
Field of Research (FOR): 020499 Condensed Matter Physics not elsewhere classified
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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