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The pressure effect on crystal structure of complex ferroelectrics Ba4Sm2Fe2Nb8O30 and Ba4Gd2Fe2Nb8O30

Urheber*innen

Jabarov,  S.
External Organizations;

Kichanov,  S.
External Organizations;

Kozlenko,  D.
External Organizations;

Mehdiyeva,  R.
External Organizations;

/persons/resource/lathe

Lathe,  Christian
CGS Centre for Geological Storage, Geoengineering Centres, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Mammadov,  A.
External Organizations;

Lukin,  E.
External Organizations;

Savenko,  B.
External Organizations;

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Zitation

Jabarov, S., Kichanov, S., Kozlenko, D., Mehdiyeva, R., Lathe, C., Mammadov, A., Lukin, E., Savenko, B. (2014): The pressure effect on crystal structure of complex ferroelectrics Ba4Sm2Fe2Nb8O30 and Ba4Gd2Fe2Nb8O30. - Zeitschrift für Kristallographie - New Crystal Structures, 229, 11, 731-734.
https://doi.org/10.1515/zkri-2014-1753


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_838897
Zusammenfassung
The crystal structure of complex oxide ferroe-lectrics Ba4Sm2Fe2Nb8O30 and Ba4Gd2Fe2Nb8O30 have been studied by means of energy-dispersive X-ray dif-fraction method at high pressure up to 4 GPa at room temperature. At ambient pressure, the crystal structure of both compounds is described by the tetragonal sym-metry with space group P4/mbm. At pressure P~1.8 GPa in Ba4Sm2Fe2Nb8O30 and at P~2.2 GPa in Ba4Gd2Fe2Nb8O30 the structure phase transition have been observed. The orthorhombic structure model with Pba2 space group for high-pressure phase of those com-pounds have been proposed. The baric dependences of lattice parameters and unit cell volumes of Ba4Sm2Fe2Nb8O30 and Ba4Gd2Fe2Nb8O30 compounds have been obtained.