423 VONSOVSKII 



Sciences, and in 1944 he was also a professor at Urals Uni- 

 versity. Since 1953 he has been a Corresponding Member of 

 the U.S.S.R. Academy of Sciences. 



In order to explain the electrical and magnetic properties of 

 metals and semiconductors, Vonsovskii (with S. Shubin) de- 

 veloped the so-called "polar" and (s-d) exchange theories, 

 treating the system of electrons in a crystal lattice as a single 

 interacting system. Besides the processes of exchange, he also 

 took into account transfer processes, which lead to the estab- 

 lishment of polar states. On the basis of these models, Vonsov- 

 skii and associates constructed a general theory on ferro- 

 magnetics close to the Curie point, and explained fractional 

 atomic moments, the optic, magnetooptic, electric and other 

 phenomena in ferromagnetics, an indirect exchange in ferrites, 

 and the general theories of transition metals with magnetic 

 atomic orders. 

 Bibliography: 



and Ya. S. Shur. Ferromagnetism. Moscow -Leningrad: 

 1948. 



Contemporary Theory on Magnetism. Moscow: 1953. 

 and S. Schubin. Zur elektronentheorie der Metalle. I-II. 

 Physikalische Zeitschrift der Sowjetunion, 1935, 7, #3, 292- 

 328; 1936, 10, #3, 348-77. 



On the exchange interaction of valentand internal electrons in 

 ferromagnetic (transition) metals. Zhur. Ekspt'l. i Teoret. 

 Fiz. 16, #11 (1946). 



and E. A. Turov . On the exchange interaction of valent and 

 internal electrons in crystals (s-d) —exchange model of tran- 

 sition metals. Zhur. Ekspt'l. i Teoret. Fiz. 24, #4 (1953). 

 Theory of interaction of electrons in a crystal lattice. Iz- 

 vest. Akad. Nauk S.S.S.R., Ser. Fiz. 12, #4 (1948), and Us- 

 pekhi Phys. Nauk 48, 289 (1952). 



Some questions on multiple -electron theory of semi- 

 conductors. Zhur. Tekh. Fiz^ 25, #12 (1955). 

 and Yu. M. Seidov . On indirect exchange interaction. Dok- 

 lady Akad. Nauk S.S.S.R. 107, #1 (1956). 

 and E. A. Turov. On the phenomenological treatment of 

 ferro- and antiferromagnetism. J. Appl. Phys. 29, #9 (1959). 

 and Yu. A. Izumov . On the statistical properties of electrons 

 in transition metals. Fiz. Metal, Metalloved 10, 321 (1960). 

 and Yu. A. Izumov. Electron theory of transition metals. 

 Uspekhi Fiz. Nauk 77, 377 (I) (1962); 78, 1 (II). 



