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Ferroelectric InMnO3: Growth of single crystals, structure and high-temperature phase transitions

Bekheet, Maged F. ; Svoboda, Ingrid ; Liu, Na ; Bayarjargal, Lkhamsuren ; Irran, Elisabeth ; Dietz, Christian ; Stark, Robert W. ; Riedel, Ralf ; Gurlo, Aleksander (2016):
Ferroelectric InMnO3: Growth of single crystals, structure and high-temperature phase transitions.
In: Journal of Solid State Chemistry, 241, pp. 54-63. Elsevier, ISSN 0022-4596,
[Article]

Abstract

To understand the origin of the ferroelectricity in InMnO3, single crystals with average size of 1 mm were grown in PbF2 flux at 950 °C. The results of single crystal X-ray diffraction, second harmonic generation and piezoresponse force microscopy studies of high-quality InMnO3 single crystals reveal that the room-temperature state in this material is ferroelectric with P63cm symmetry. The polar InMnO3 specimen undergoes a reversible phase transition from non-centrosymmetric P63cm structure to a centrosymmetric P63/mmc structure at 700 °C as confirmed by the in situ high-temperature Raman spectroscopic and synchrotron X-ray diffraction experiments.

Item Type: Article
Erschienen: 2016
Creators: Bekheet, Maged F. ; Svoboda, Ingrid ; Liu, Na ; Bayarjargal, Lkhamsuren ; Irran, Elisabeth ; Dietz, Christian ; Stark, Robert W. ; Riedel, Ralf ; Gurlo, Aleksander
Title: Ferroelectric InMnO3: Growth of single crystals, structure and high-temperature phase transitions
Language: English
Abstract:

To understand the origin of the ferroelectricity in InMnO3, single crystals with average size of 1 mm were grown in PbF2 flux at 950 °C. The results of single crystal X-ray diffraction, second harmonic generation and piezoresponse force microscopy studies of high-quality InMnO3 single crystals reveal that the room-temperature state in this material is ferroelectric with P63cm symmetry. The polar InMnO3 specimen undergoes a reversible phase transition from non-centrosymmetric P63cm structure to a centrosymmetric P63/mmc structure at 700 °C as confirmed by the in situ high-temperature Raman spectroscopic and synchrotron X-ray diffraction experiments.

Journal or Publication Title: Journal of Solid State Chemistry
Journal volume: 241
Publisher: Elsevier
Uncontrolled Keywords: Single crystals, Ferroelectrics, Multiferroics, Phase transitions, Hexagonal rare-earth manganites, in situ X-ray diffraction
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science > Physics of Surfaces
11 Department of Materials and Earth Sciences > Material Science > Structure Research
Profile Areas
Profile Areas > Thermo-Fluids & Interfaces
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 30 Sep 2016 07:59
Official URL: http://dx.doi.org/10.1016/j.jssc.2016.05.031
Funders: The financial support by the German Research Foundation DFG (Grant number GU 992/8-1) within the priority program SPP 1236 and DESY (Proposal I-20110174) is greatly acknowledged.
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