Experimental evidence for an intermediate phase in the multiferroic YMnO3

Abstract

We have studied YMnO${}_3$ by high-temperature synchrotron X-ray powder diffraction, and have carried out differential thermal analysis and dilatometry on a single crystal sample. These experiments show two phase transitions at about 1100K and 1350K, respectively. This demonstrates the existence of an intermediate phase between the room temperature ferroelectric and the high temperature centrosymmetric phase. This study identifies for the first time the different high-temperature phase transitions in YMnO${}_3$.

10 pages 5 figures. New version, Additional data, Journal of Physics: Condensed Matter, in Press

References in corpus (5)

• Spin current and magneto-electric effect in non-collinear magnets
• Ferroelectricity in spiral magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• The ferroelectric transition in YMnO${}_3$ from first principles
• A Field-Induced Re-Entrant Novel Phase and A Ferroelectric-Magnetic Order Coupling in HoMnO3

Cited by in corpus (13)

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• The High Temperature Phase Transitions of Hexagonal YMnO3
• Direct observation of the proliferation of ferroelectric loop domains and vortex-antivortex pairs
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• Hexagonal RMnO${}_3$: a model system for 2D triangular lattice antiferromagnets
• Unconventional order-disorder phase transition in improper ferroelectric hexagonal manganites
• Hidden order in hexagonal RMnO3 multiferroics
• Magnetic structure and multiferroicity of Sc-substituted hexagonal YbFeO${}_3$
• THz and infrared studies of multiferroic hexagonal Y_(1-x)Eu_xMnO_3 (x=0 - 0.2) ceramics
• Measurements and ab initio Molecular Dynamics Simulations of the High Temperature Ferroelectric Transition in Hexagonal RMnO3
• Combinatorial model for the ferroelectric domain-network formation in hexagonal manganites
• h-ErMnO3 absorbance, reflectivity and, emissivity in the THz to mid-infrared from 2 K to 1700 K: carrier screening, Fröhlich resonance, small polarons, and bipolarons
• Surface Reconstruction of Hexagonal Y-doped HoMnO3 and LuMnO3 studied using low-energy electron diffraction