Competing magnetic and structural states in multiferroic YMn${_2}$O${_5}$ at high pressure
- Kozlenko, D. P.
- Dang, N. T.
- Mehdiyeva, R. Z.
- Smotrakov, V. G.
- Savenko, B. N.
- Kichanov, S. E.
- Lukin, E. V.
- Pashayev, A. M.
- Mammadov, A. I.
- Jabarov, S. H.
- Dubrovinsky, L. S.
- Liermann, H.-P.
- Morgenroth, W.
DOIAbstract
The magnetic, structural, and vibrational properties of YMn${_2}$O${_5}$ multiferroic have been studied bymeans of neutron, x-ray powder diffraction, and Raman spectroscopy at pressures up to 6 and 30 GPa,respectively. Application of high pressure,P >1 GPa, leads to a gradual suppression of the commensurate andincommensurate antiferromagnetic (AFM) phaseswith a propagation vector q = (1/2,0,q${_z}$∼1/4) and appearanceof the commensurate AFM phase with q = (1/2,0,1/2). This observation is sharply contrasting to general trendtowards stabilization of commensurate AFM phase with q = (1/2,0,1/4) found in other RMn${_2}$O${_5}$ compoundsupon lattice compression. At P ∼ 16 GPa a structural phase transformation accompanied by anomalies in latticeco...
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