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Parameterization of the coupling between strain and order parameter for LuF[SeO3]

DOI: 10.1107/S1600576714002192 DOI Help

Authors: Oxana Magdysyuk (Max Planck Institute for Solid State Research, Stuttgart) , Melanie Müller (Max Planck Institute for Solid State Research, Stuttgart) , Robert Dinnebier (Max Planck Institute for Solid State Research, Stuttgart) , Christian Lipp (Max Planck Institute for Solid State Research, Stuttgart) , Thomas Schleid (Max Planck Institute for Solid State Research, Stuttgart)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Applied Crystallography , VOL 47 , PAGES 701 - 711

State: Published (Approved)
Published: April 2014

Abstract: The high-temperature phase transition of LuF[SeO3] has been characterized by time-resolved high-resolution synchrotron powder diffraction. On heating, a second-order structural phase transition was found at 393 K, while on cooling the same phase transition occurs at 371 K, showing a large hysteresis typical for a first-order phase transition. Detailed analysis using sequential and parametric whole powder pattern fitting revealed that the coupling between the strain and the displacive order parameter determines the behaviour of the material during the phase transition. Different possible coupling mechanisms have been evaluated and the most probable rationalized.

Journal Keywords: Phase Transitions;Synchrotron Powder Diffraction;Strain;Displacive Order Parameter

Subject Areas: Chemistry, Physics


Instruments: I11-High Resolution Powder Diffraction

Other Facilities: Author contacted re proposal number - SG