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- Title
Phase transition to a commensurate magnetic structure in PrMnO oxide.
- Authors
Men'shenin, V.
- Abstract
On the basis of the experimentally obtained structure of the magnetic phase of the PrMnO oxide, it is found that in the temperature interval from 18 to 25 K, a transition to this phase should be analytically described by a two-component order parameter and that the effective Hamiltonian of the system should contain two independent fourth-order invariants with respect to the components of this parameter. With the use of the results of renormalization group analysis of phase transitions with this effective Hamiltonian, which are known from the literature, it is established that a second-order transition occurs. It is shown that the commensurate antiferromagnetic phase resulting from this transition has no electric polarization because this polarization is forbidden by the symmetry of the system.
- Subjects
PHASE transitions; COMMENSURATE-incommensurate transitions; MAGNETIC structure; OXIDES; HAMILTONIAN systems; RENORMALIZATION group
- Publication
Journal of Experimental & Theoretical Physics, 2015, Vol 120, Issue 6, p1019
- ISSN
1063-7761
- Publication type
Article
- DOI
10.1134/S1063776115050052