Anatolii Stepanovich Sonin (On the occasion of his 80th birthday)
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Anatolii Stepanovich Sonin (On the Occasion of His 80th Birthday) DOI: 10.1134/S1063774511040237
Professor Anatolii Stepanovich Sonin, wellknown expert in the physics of crystals, doctor of physics and mathematics, and doctor of chemistry, turned 80 on March 7, 2011. Sonin was born in 1931 in Moscow. In 1956 he graduated from the Faculty of Chemistry at Moscow State University, where he specialized in crystallogra phy and crystal chemistry. As a student, Sonin began to study the optical properties of crystals of complex compounds. In 1956 he published his first paper in the journal Kristallografiya (Crystallography Reports). After graduating from Moscow State University, Sonin worked in applied research institutions (Central Research Laboratory of Piezoelectric Devices and Research Institute of Instrument Making), where he passed through several stages of career growth until he became the head of a laboratory. In this period, Sonin sought after new piezoelectric, ferroelectric, and elec
trooptic crystals and studied their properties. Sonin’s studies in the field of crystal symmetry are of great importance. He considered the changes in the spatial symmetry during the formation of spontaneous polar ization and the changes in the point symmetry caused by antipolarization. Sonin studied by correspondence at the postgradu ate course of the Institute of Crystallography, USSR Academy of Sciences, specializing in crystallography and crystal physics (his supervisor was Professor I.S. Zheludev). After his postgraduate course, in 1962, Sonin defended his candidate’s dissertation in physics and mathematics, which was devoted to the electrical properties of ferroelectrics. In 1968 Sonin began to work at the AllUnion Research Institute of Optical and Physical Measure ments, where he concentrated on studying the nonlin ear optical properties of crystals (electrooptics and the generation of optical harmonics). Considering Sonin’s scientific activity at that time, one can call him one of the founders of modern elec trooptics. Indeed, he developed the macroscopic the ory of electrooptical effects in crystals, elaborated techniques for studying these effects, investigated the electrooptical properties of many new crystals, and established the relationship between the electroopti cal properties of crystals and their structure; moreover, he discovered some new effects: spontaneous and induced electrooptic absorption. Sonin was also the first to investigate the secondharmonic generation in ferroelectric crystals. All these results formed the basis of his doctoral dissertation in physics and mathemat ics (1971) and the monograph Electrooptics of Crystals (1971) that he published with Vasilevskaya. At the AllUnion Research Institute of Optical and Physical Measurements, Sonin began to study liquid crystals. He paid most of his attention to the fabrica tion of cholesterics and the study of their optical prop erties. The selective light scattering and the optical activity of many cholesterics and their mixtures
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