1207.0049 (Khisa Sh. Borlakov et al.)

On conservation of the of crystal lattice symmetry in transition at
Curie point in exchange magnets    [PDF]

Khisa Sh. Borlakov, Albert Kh. Borlakov

We show that symmetry of the crystal lattice of exchange magnets (containing only 3d magneto-active elements) does not change at the Curie point; only the magnetic symmetry of the crystal is decreasing in the transition point. In the non-exchange magnets (containing only rare-earth magneto-active elements), on the contrary, both the magnetic and crystal-chemical symmetry decrease at the Curie point. There is isotropic magnetic phase in exchange magnets; and their magnetic symmetry is described by color groups of magnetic symmetry of P-type. Non-exchange magnets do not have isotropic phase; their symmetry is described by color groups of magnetic symmetry of Q-type.

View original: http://arxiv.org/abs/1207.0049