Proton T1 for solid H2 in a-Si:H

V. P. Bork, P. A. Fedders, R. E. Norberg, J. B. Boyce, M. Stutzmann

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3 Scopus citations


Proton spin-lattice relaxation times T1(H2) are reported for solid n-H2 in plasma-deposited a-Si:H. T1(H2) has been measured for the dipolar Pake doublet NMR component (corresponding to 0-H2 molecules frozen out into mj = 0 states) between 1.6 and 13 K in an unannealed sample and between 1.6 and 5 K in a sample annealed at 500°C. In both samples below 3 K T1 (H2) is about the same as the T1 (H) observed for the lattice-bound protons. At warmer temperatures T1 (H2) is 30 to 50% smaller than T1 (H). The 175 kHz doublet H2 cannot rapidly exchange spin energy with the narrower line-width lattice H and the two systems relax independently. The temperature variations of T1 (H2) and T1 (H) are compared with the predictions of phonon-Raman relaxation models.

Original languageEnglish
Pages (from-to)711-714
Number of pages4
JournalJournal of Non-Crystalline Solids
Issue numberPART 1
StatePublished - 2 Dec 1985
Externally publishedYes


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