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Effect of high hydrostatic pressure on the dielectric properties of BaTiO 3 single crystals
Author(s) -
Klimowski J.
Publication year - 1962
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19620020410
Subject(s) - curie temperature , hydrostatic pressure , dielectric , materials science , hydrostatic equilibrium , permittivity , condensed matter physics , phase transition , curie , mineralogy , analytical chemistry (journal) , thermodynamics , chemistry , physics , ferromagnetism , optoelectronics , chromatography , quantum mechanics
The dielectric permittivity ϵ of BaTiO 3 single crystals versus the temperature T at different hydrostatic pressure σ, and ϵ(σ) at different T , was measured. The highest σ achieved was 12 800 kg/cm 2 , between 22 °C and 180 °C. At σ < 3500 kg/cm 2 , the Curie point T c decreases at a rate of −4.3 × 10 −3 °C cm 2 /kg which ceases to be constant for σ > 3500 kg/cm 2 . The Curie‐Weiss temperature falls with growing σ. At higher σ, the Curie constant rises with growing σ. The ϵ(σ) graphs at constant T below 120 °C exhibit maxima related to an induced phase transition. Above 120 °C, ϵ decreases with growing σ. „Memory of pressure” is observed on removal of high hydrostatic pressure.