Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 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.

11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th