Spontaneous Polarization of Ferroelectric Triglycine Sulfate between 2.2 and 20 K
Abstract
The temperature dependence of the spontaneous polarization of ferroelectric triglycine sulfate has been determined in the range 2.2-20 K by measuring the charge released by a large crystalline sample with a Keithley electrometer. Above ~8 K this temperature dependence is ΔPs=Ce-ΔkT, corresponding to a two-level system with energy splitting Δ=hνE=9.08×10-15 erg, while between 2.2 and 4 K it is ΔPs=AT32. Both temperature dependences are consistent with recent specific-heat measurements by Lawless.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 1978
- DOI:
- 10.1103/PhysRevLett.41.1822
- Bibcode:
- 1978PhRvL..41.1822V