Molecular solid glasses: new insights into frustrated systems

Details Molecular solid glasses: new insights into frustrated systems Molecular solid glasses: new insights into frustrated systems

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001njph....3...17p&link_type=abstract

New Journal of Physics, Volume 3, Issue 1, pp. 17 (2001).

Physics

1

Scientific paper

High sensitivity dielectric constant and heat capacity measurements are reported for solid N2-Ar mixtures as well as pure N2 in the presence of a small external ac electric field in the audio frequency range. Unexpected field-induced aging and memory effects are observed for thermal cycles of field cooled samples, above a well-defined temperature Th. The magnitude and temperature dependences of the effects exclude any simple interpretation in terms of lattice defects. The results show that the free energy surface includes a complexity that allows for metastable states and that tunnelling can occur between the states.

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