Magnetic transition from the paramagnetic to long-period structure in RMn{sub 2}O{sub 5} multiferroics: Renormalization group analysis of critical behavior

Journal Article · Sat Jun 15 00:00:00 EDT 2013 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776113060101· OSTI ID:22122855

Men'shenin, V. V., E-mail: [e-mail] ^[1]

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1. Russian Academy of Sciences, Institute of Metal Physics, Ural Branch (Russian Federation)

A transition from the paramagnetic state to a long-period magnetic structure with an incommensurate wave vector along one crystallographic axis in RMn{sub 2}O{sub 5} multiferroics is considered. An effective Hamiltonian for these oxides is constructed with allowance for spin fluctuations. Critical points are found, and their stability is analyzed using the renormalization group approach. It is shown that critical fluctuations in these compounds admit a second-order phase transition with respect to a multicomponent order parameter.

• OSTI ID: 22122855
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 116, Issue 6; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALLOGRAPHY
FLUCTUATIONS
HAMILTONIANS
MANGANESE OXIDES
ORDER PARAMETERS
PARAMAGNETISM
PHASE TRANSFORMATIONS
RENORMALIZATION
SPIN