Effect of high hydrostatic pressure on the dielectric properties of BaTiO3 single crystals

✍ Scribed by J. Klimowski

• Publisher: John Wiley and Sons
• Year: 1962
• Tongue: English
• Weight: 238 KB
• Volume: 2
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.19620020410

✦ Synopsis

Abstract

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.