Crystal optics, ferroelectricity and professor kobayashi

Abstract

Professor Jinzo Kobayashi's major contributions to the fields of crystal optics and ferro-electricity over the last four decades are surveyed. His early observation, on the basis of optical measurement, that PbTiO₃ exhibits greater covalency than BaTiO₃ is typical of his unique skills and insight; an origin for this effect is proposed. Emphasis is placed on his HAUP method for the highly accurate measurement of optical activity components, birefringence, and rotation of the optical indicatrix in any crystal, regardless of its symmetry. Many of the ferroelectrics on which he worked, and several of the resulting connections with others in his fields of interest, are noted.

Key Words:

• Crystal optics
• ferroelectricity
• phase transitions
• optical activity
• HAUP