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

Bekheet, Maged F. and Svoboda, Ingrid and Liu, Na and Bayarjargal, Lkhamsuren and Irran, Elisabeth and Dietz, Christian and Stark, Robert W. and Riedel, Ralf and Gurlo, Aleksander (2016):
Ferroelectric InMnO3: Growth of single crystals, structure and high-temperature phase transitions.
In: Journal of Solid State Chemistry, Elsevier, pp. 54-63, 241, ISSN 0022-4596,
[Online-Edition: http://dx.doi.org/10.1016/j.jssc.2016.05.031],
[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. and Svoboda, Ingrid and Liu, Na and Bayarjargal, Lkhamsuren and Irran, Elisabeth and Dietz, Christian and Stark, Robert W. and Riedel, Ralf and 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
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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