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ABSTRACT
Memory effects generated by a prolonged transverse electric field in the triglycine sulphate (TGS) ferroelectric were investigated quantitatively. Four characteristic temperatures were introduced, TS ≤ TA ≤ TH < TC, where TC is a para-ferroelectric critical temperature. Measurements of depolarizing transverse electric current carried out in heating from TS (or TA) up to above TC were preceded by a crystal exposure to a prolonged transverse electric field at TA followed (or not) by its temporary heating to TH temperature. The experimental data indicate that the crystal ‘remembered’ TH (if TH > TA) or TA (if TH = TA). The accuracy of determining both temperatures was estimated. It was also shown that the memory observed during the measurements of transverse depolarization current was long enough for the experimental results to be applicable in practice. A new kind of a low-cost maximum temperature thermometer with linear dimensions of the order of 10−3 m was presented.
Disclosure statement
No potential conflict of interest was reported by the author(s).