Access the full text.
Sign up today, get DeepDyve free for 14 days.
Loading next page...
/lp/american-physical-society-aps/dielectric-constant-in-paraelectric-perovskites-zAmnpcqiYS
References
References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.
- Publisher
- American Physical Society (APS)
- Copyright
- Copyright © 1964 The American Physical Society
- ISSN
- 1536-6065
- DOI
- 10.1103/PhysRev.135.A748
- Publisher site
- See Article on Publisher Site
Abstract
The relative dielectric constant of a series of perovskites such as CaTi O 3 , SrTi O 3 , BaTi O 3 , PbTi O 3 , and KTa O 3 has been measured at microwave frequencies over a wide range above the Curie temperature. It was found that a Curie-Weiss law of the form ε = ε L + C ( T - T c ) is accurately obeyed where ε L is of the order of 50 and represents the dielectric constant in the limit of infinite temperature, and that T c and C , the Curie temperature and Curie constant, increase monotonically with increasing cation mass. ε L consists of contributions from the electronic polarizability, temperature-independent optically active lattice vibrations, and a dominant term stemming from the finite frequency of the temperature-dependent soft mode in the limit of infinite temperature. The limiting frequency of the "soft mode" at high temperatures is estimated.
Journal
Physical Review – American Physical Society (APS)
Published: Aug 3, 1964