Professor Schmidt will investigate proton glass dynamics using measurements of the dielectric susceptibility and nuclear magnetic resonance techniques at pressures up to 5 kbar and temperatures to 4 Kelvin. The proton glass system, Rb1- x(NH4)xH2PO4, is a mixed system of a ferroelectric and an antiferroelectric. Substitutions with deuterium or arsenic will be made for the hydrogen or phosphorous respectively. The competing ferro- and antiferro-electric interactions prevent a transition to an ordered phase and lead to glassy behavior as evidenced by the dielectric relaxation time. A Monte-Carlo simulation of this system will be carried out. An interpretation based on hindered diffusion of thermally generated intrinsic defects, as developed by the principal investigator, will be applied to the new results.

Agency
National Science Foundation (NSF)
Institute
Division of Materials Research (DMR)
Application #
8714487
Program Officer
Project Start
Project End
Budget Start
1988-01-15
Budget End
1991-06-30
Support Year
Fiscal Year
1987
Total Cost
$84,000
Indirect Cost
Name
Montana State University
Department
Type
DUNS #
City
Bozeman
State
MT
Country
United States
Zip Code
59717