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

Naumov, Pavel G.; Ksenofontov, Vadim; Lyubutin, I. S.; Medvedev, S. A.; Barkalov, O. I.; Taras, P.; Magos-Palasyuk, Ewelina; Felser, Claudia

doi:10.1016/j.solidstatesciences.2015.09.005

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…X-ray diffraction studies of BTFS polycrystal under high pressures revealed a structural phase transition at P = 20 GPa, which is accompanied by a sharp decrease in the unit-cell volume (by 8.6%), but a transition to the monoclinic structure was not recorded. However, more recently the synchrotron X-ray diffraction studies of this compound under high pressure revealed the transformation to the monoclinic structure at this phase transition near 20 GPa …”

Section: Introductionmentioning

confidence: 99%

“…However, more recently the synchrotron X-ray diffraction studies of this compound under high pressure revealed the transformation to the monoclinic structure at this phase transition near 20 GPa. 18 The anharmonicity of atomic displacements in La 3 Ga 5 SiO 14 as a measure of disordering and a possible precursor of phase transformations was observed for the first time in ref 19. Then, as the accuracy and reliability of results increased, it was found in a number of langasite-family compounds, 20,21 which were investigated using the approach of intermeasurement minimization (i.e., by a comparison of experimental data obtained under different experimental conditions).…”

Section: Introductionmentioning

confidence: 99%

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Growth and X-ray Diffraction Study and Specific Features of Thermal Expansion of Ba₃NbFe₃Si₂O₁₄ Single Crystal from the Langasite Family

Dudka

Balbashov

Lyubutin

2016

Crystal Growth & Design

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Ba3NbFe3Si2O14 single crystals of promising multiferroic properties from the langasite family have been grown by floating zone melting. The accurate high-resolution X-ray diffraction studies of this crystal were performed on a diffractometer with a two-dimensional CCD detector at 293 and 90.5 K. To compensate systematic measurement errors, two data sets were obtained independently for different sample orientations at each temperature. The structure refinement was performed based on averaged data sets with the following results: space group P321, Z = 1; a = 8.52421(8), c = 5.23372(5) Å at 293 K; and a = 8.5211(2), c = 5.2243(7) Å, at 90.5 K. The R factors of the model structure refinement were found to be R/wR = 1.15/1.29% for 4396 independent reflections at 293 K, and R/wR = 1.13/1.35% for 4203 reflections at 90.5 K. A displacement of magnetic ion Fe3+ in the 3f site was found with reducing temperature. It was also established from comparison of the structures of Ba3NbFe3Si2O14 and Ba3TaFe3Si2O14 that the mobility of the cation in the 3f sites changes with an isomorphic substitution of Nb cations by Ta in the octahedral sites. This can change the characteristics of the structure and magnetic helix responsible for multiferroic properties of the iron-containing langasites. An anomaly in thermal expansion is found in the Ba3NbFe3Si2O14 crystal. When the temperature is reduced, the compression ratio along the c axis is about two times larger than that along the a axis, which is not typical of other langasite-family crystals.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Growth and X-ray Diffraction Study and Specific Features of Thermal Expansion of Ba₃NbFe₃Si₂O₁₄ Single Crystal from the Langasite Family

Dudka

Balbashov

Lyubutin

2016

Crystal Growth & Design

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Magnetic properties and helical spin structure of another compound Ca3SbFe3Si2O14 from the family of iron-containing langasites

Lyubutin,

Starchikov,

Lyubutina

et al. 2024

Journal of Alloys and Compounds

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Magnetic phase separation and strong enhancement of the Néel temperature at high pressures in a new multiferroic Ba3TaFe3Si2O14

et al. 2017

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

Cited by 3 publications

References 18 publications

Growth and X-ray Diffraction Study and Specific Features of Thermal Expansion of Ba₃NbFe₃Si₂O₁₄ Single Crystal from the Langasite Family

Growth and X-ray Diffraction Study and Specific Features of Thermal Expansion of Ba₃NbFe₃Si₂O₁₄ Single Crystal from the Langasite Family

Magnetic properties and helical spin structure of another compound Ca3SbFe3Si2O14 from the family of iron-containing langasites

Magnetic phase separation and strong enhancement of the Néel temperature at high pressures in a new multiferroic Ba3TaFe3Si2O14

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

Cited by 3 publications

References 18 publications

Growth and X-ray Diffraction Study and Specific Features of Thermal Expansion of Ba3NbFe3Si2O14 Single Crystal from the Langasite Family

Growth and X-ray Diffraction Study and Specific Features of Thermal Expansion of Ba3NbFe3Si2O14 Single Crystal from the Langasite Family

Magnetic properties and helical spin structure of another compound Ca3SbFe3Si2O14 from the family of iron-containing langasites

Magnetic phase separation and strong enhancement of the Néel temperature at high pressures in a new multiferroic Ba3TaFe3Si2O14

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Product

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Growth and X-ray Diffraction Study and Specific Features of Thermal Expansion of Ba₃NbFe₃Si₂O₁₄ Single Crystal from the Langasite Family

Growth and X-ray Diffraction Study and Specific Features of Thermal Expansion of Ba₃NbFe₃Si₂O₁₄ Single Crystal from the Langasite Family