Phenomenological theory of spin-orbit phase transitions
  This work is devoted to the logical proof of the Goodenough and Khomskii idea of the existence of spin-orbit transitions in transition magnetic crystals. In agreement with the basics of the Landau theory of phase transitions the phenomenological theory of spin-orbit transitions is constructed. The general scheme of the theory is illustrated by the application to the description of magnetic and structural transformations in the copper ferrite CuFe2O4. 
Khisa Sh. Borlakov and Albert Kh. Borlakov (North Caucasian State   Humanitarian and Technological Academy)
cond-mat.str-el cond-mat.other