Experimental study of electric field influence on low-temperature, long-time relaxation in crystalline ferroelectrics

Journal Article · Thu Dec 01 00:00:00 EST 1988 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00683570· OSTI ID:5928833

Sahling, S; Kolac, M; Sahling, A

Calorimetric measurements with polycrystalline Pb/sub 0.915/La/sub 0.085/ x (Zr/sub 0.65/Ti/sub 0.35/)O/sub 3/ were performed at liquid helium temperatures in an electric field E (0 less than or equal to E less than or equal to 4.3 kV/cm). Heat released after cooling from T/sub 1/ (1.3 K < T/sub 1/ less than or equal to 35 K) to T/sub 0/ = 1.3 K is very similar to that in amorphous metals and dielectrics. Experimental results disagree with the standard tunneling model. The observed heat release may be explained assuming the existence of a maximum energy epsilon/sub f/ in the distribution function. The maximum relaxation time /tau//sub max/ was found as a function of T/sub 1/. A similar heat release is observed after switching on or off the electric field, independent of T for 1.1 K less than or equal to T less than or equal to 3 K, proportional to E/sup 2/ with /tau//sub max/ approx. E. No heat release was observed in the KH/sub 2/PO/sub 4/ single crystal.

• Research Organization: Joint Institute for Nuclear Research, Dubna (USSR)
• OSTI ID: 5928833
• Journal Information: J. Low Temp. Phys.; (United States), Vol. 73:5-6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
FERROELECTRIC MATERIALS
ELECTRIC FIELDS
TITANATES
RELAXATION TIME
ZIRCONATES
AMORPHOUS STATE
CALORIMETRY
HEAT TRANSFER
LANTHANUM COMPOUNDS
LEAD COMPOUNDS
MATHEMATICAL MODELS
PHASE TRANSFORMATIONS
PLZT
POLYCRYSTALS
SPECIFIC HEAT
TEMPERATURE EFFECTS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
CRYSTALS
ENERGY TRANSFER
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
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