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Optical activity of ferroelectric dicalcium strontium propionate
Author(s) -
Kobayashi J.,
Bouillot J.,
Kinoshita K.
Publication year - 1971
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.2220470227
Subject(s) - ferroelectricity , dielectric , strontium , materials science , condensed matter physics , tensor (intrinsic definition) , chemistry , physics , optoelectronics , mathematics , organic chemistry , pure mathematics
Optical rotatory power of Ca 2 Sr(C 2 H 5 CO 2 ) 6 was accurately measured over a wide temperature range containing both paraelectric and ferroelectric states. The gyration tensor g 33 has been determined from the experimental data; for instance, g 33 = 2.131 × 10 −5 , paraelectric at 20 °C, and 2.129 × 10 −5 , ferroelectric at −20 °C (λ = 546 nm). A theory of optical activity based upon Born's theory has been developed in order to apply it to the ferroelectricity. In the light of the theory the ferroelectric property of Ca 2 Sr(C 2 H 5 CO 2 ) 6 is discussed, and it has been revealed that some change occurs around −64 °C in either antisymmetrical parts of interelectronic coupling tensor or shifts of the atoms responsible for its ferroelectricity.