Structural transitions under high-pressure in a langasite-type multiferroic Ba3TaFe3Si2O14

Naumov PG, Ksenofontov V, Lyubutin IS, Medvedev SA, Barkalov OI, Palasyuk T, Magos-Palasyuk E, Felser C (2015)

Publication Type: Journal article

Publication year: 2015

Journal

Solid State Sciences Elsevier

Book Volume: 49

Pages Range: 37-42

DOI: 10.1016/j.solidstatesciences.2015.09.005

Abstract

The iron containing langasite family compound Ba3Ta57Fe3Si2O14 was studied at high pressure up to 30 GPa at room temperature by means of in situ X-ray diffraction, Raman and Mössbauer spectroscopies in diamond anvil cell. Two structural transitions at pressures ∼5 and ∼20 GPa are observed. At ∼5 GPa, the low-pressure trigonal P321 phase undergoes phase transition to the most likely P3 structure as manifested by slight increase in the c/a ratio and by anomalies of the Mössbauer and Raman spectra parameters. At ∼20 GPa, the first order phase transition to monoclinic structure occurred with a drop of unit cell volume by 9%. The appearance of the ferroelectric state at such transitions is discussed in connection with the multiferroic properties.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) Russian Academy of Sciences / Росси́йская акаде́мия нау́к (RAS) RU Russian Federation (RU) Polska Akademia Nauk (PAN) / Polish Academy of Sciences PL Poland (PL)

How to cite

APA:

Naumov, P.G., Ksenofontov, V., Lyubutin, I.S., Medvedev, S.A., Barkalov, O.I., Palasyuk, T.,... Felser, C. (2015). Structural transitions under high-pressure in a langasite-type multiferroic Ba3TaFe3Si2O14. Solid State Sciences, 49, 37-42. https://dx.doi.org/10.1016/j.solidstatesciences.2015.09.005

MLA:

Naumov, P. G., et al. "Structural transitions under high-pressure in a langasite-type multiferroic Ba3TaFe3Si2O14." Solid State Sciences 49 (2015): 37-42.

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