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Pis'ma v Zh. Èksper. Teoret. Fiz.:

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Pis'ma v Zh. Èksper. Teoret. Fiz., 2005, Volume 82, Issue 4, Pages 212–216 (Mi jetpl1536)  

This article is cited in 26 scientific papers (total in 26 papers)


High-pressure effect on the crystal and magnetic structures of the frustrated antiferromagnet YMnO3

D. P. Kozlenkoa, S. E. Kichanova, S. Leeb, J.-G. Parkbc, V. P. Glazkovd, B. N. Savenkoa

a Joint Institute for Nuclear Research
b Department of Physics and Institute of Basic Science, SungKyunKwan University, Suwon 440-746, Korea
c Center for Strongly Correlated Materials Research, Seoul National University, Seoul 151-742, Korea
d Russian Research Centre "Kurchatov Institute"

Abstract: The high-pressure (to 5 GPa) effect on the crystal and magnetic structures of the hexagonal manganite YMnO3 is studied by neutron diffraction in the temperature range 10–295 K. A spin-liquid state due to magnetic frustration on the triangular lattice formed by Mn ions is observed in this compound at normal pressure and T > T N = 70 K, and an ordered triangular antiferromagnetic state with the symmetry of the irreducible representation Γ1 arises at T < T N. The high-pressure effect leads to a spin reorientation of Mn magnetic moments and a change in the symmetry of the antiferromagnetic structure, which can be described by a combination of the irreducible representations Γ1 and Γ2. In addition, it is observed that the ordered magnetic moment of Mn ions decreases from 3.27 μB (5 GPa) to 1.52 μB (5 GPa) at T = 10 K and diffuse scattering is enhanced at temperatures close to T N. These effects can be explained within the model of the coexistence of the ordered antiferromagnetic phase and the spin-liquid state, whose volume fraction increases with pressure due to the enhancement of frustration effects.

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English version:
Journal of Experimental and Theoretical Physics Letters, 2005, 82:4, 193–197

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Document Type: Article
PACS: 62.50.+ p, 75.25.+z, 75.47.Lx
Received: 06.06.2005

Citation: D. P. Kozlenko, S. E. Kichanov, S. Lee, J.-G. Park, V. P. Glazkov, B. N. Savenko, “High-pressure effect on the crystal and magnetic structures of the frustrated antiferromagnet YMnO3”, Pis'ma v Zh. Èksper. Teoret. Fiz., 82:4 (2005), 212–216; JETP Letters, 82:4 (2005), 193–197

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    3. Jo Y., Jang K.-H., Park J.-G., Kim H.C., Kim T.H., Kim K.H., Hur N., Park S., Cheong S.-W., “Measurements of the pressure and magnetic field dependence of multiferroic DyMn2O5”, Physical Review B, 76:1 (2007), 012406  crossref  adsnasa  isi  elib  scopus
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