Article Dans Une Revue Journal of Magnetic Resonance Année : 2018

Overhauser effects in non-conducting solids at 1.2 K

Résumé

Recently, it was observed that protons in non-conducting solids doped with 1,3-bisdiphenylene-2-phenylallyl (BDPA) or its sulfonated derivative (SA-BDPA) can be polarized through Overhauser effects via resonant microwave irradiation. These effects were present under magic angle spinning conditions in magnetic fields between 5 and 18.8 T and at temperatures near 100 K. This communication reports similar effects in static samples at 6.7 T and, more importantly, at temperatures as low as 1.2 K, in a different dynamic regime than in the previous study. Our results provide new information towards understanding the mechanism of the Overhauser effect in non-conducting solids. We discuss possible origins of the fluctuations that can give rise to an Overhauser effect at such low temperatures.

Dates et versions

hal-01708854 , version 1 (14-02-2018)

Identifiants

Citer

X. Ji, T.V. Can, F. Mentink-Vigier, Aurélien Bornet, Jonas Milani, et al.. Overhauser effects in non-conducting solids at 1.2 K. Journal of Magnetic Resonance, 2018, 286, pp.138-142. ⟨10.1016/j.jmr.2017.11.017⟩. ⟨hal-01708854⟩
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