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2000 | 97 | 5 | 867-870
Article title

Quasicritical Behaviour of the NMR and µSR Relaxation in YMn_{2}D_{x}

Content
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Languages of publication
EN
Abstracts
EN
The magnetic and structural properties of YMn_{2} are strongly influenced by introduction of hydrogen (deuterium) in the structure, however, it only slightly modifies the noncollinear antiferromagnetic structure of the compound. The temperature dependences of the NMR relaxation times T_{1} and T_{2} of deuterium and the zero-field relaxation of muons in YMn_{2}D_{x} were measured at temperatures above the magnetic ordering temperature T_{N}. The corresponding relaxation rates are described by the empirical expression (T/T_{N}-1)^{-η}, where the exponent η increases linearly with deuterium concentration x. To explain this behaviour, the Moriya theory of spin fluctuations was used. The expressions for NMR and μSR relaxation rates have been calculated. The resultant formulae agree well with the experiment, giving reasonable values of fitting parameters. The results obtained are discussed in terms of spin fluctuation excitation spectrum.
Keywords
EN
Year
Volume
97
Issue
5
Pages
867-870
Physical description
Dates
published
2000-05
References
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv97z534kz
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