Phase transition to a commensurate magnetic structure in PrMn{sub 2}O{sub 5} oxide
- Russian Academy of Sciences, Mikheev Institute of Metal Physics, Ural Branch (Russian Federation)
On the basis of the experimentally obtained structure of the magnetic phase of the PrMn{sub 2}O{sub 5} 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.
- OSTI ID:
- 22472221
- Journal Information:
- Journal of Experimental and Theoretical Physics, Vol. 120, Issue 6; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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