Internal friction of amine-intercalated TaS2

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Abstract

Internal friction measurements on TaS2 and a representative number of its amine intercalates are reported. The intercalants are observed to magnify the features seen in the internal friction curve of pure TaS2 and to introduce new features such as abrupt decreases in internal friction (IF) attributed to the melting of certain intercalants and a large low-temperature IF peak attributed to thermally activated proton exchange among intercalant molecules. The intercalant configurations, host-layer separations, and the number of amine groups per intercalant molecule, are used to explain the differences seen in the internal friction spectra of the intercalated samples.

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