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Updated: Jan 9, 2026
Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
Published on: March 27, 2018
The influence of ambient high pressure to structural features of barium hexaferrite
Vitalii Turchenko1,2, Zbigniew Surowiec3, V G Kostishyn2
1Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 141980 Dubna, Russia.
Abstract:
A comprehensive analysis of the magnetic properties, crystal structure and magnetic configuration of the ceramic BaFe12O19, prepared using the sol-gel method, was conducted over the temperature range from 4 K to room temperature. The impact of ambient pressure on the crystal and magnetic structures of ceramic BaFe12O19has enabled the determination of bulk modulusB0∼ 123.8 GPa and its first-order derivativeBp' ∼ 4.1, as well as the coefficients of linear compressibility of the lattice parameters for the hexagonal unit cell. The results of neutron diffraction collected at pressures ranging from 0.1 GPa to 5 GPa were analyzed in the framework of both centrosymmetric SG P63/mmc (No. 194) and non-centrosymmetric SG P63mc (No. 186). The decrease in the total magnetic moment with an increase in ambient pressure was associated with a weakening of the exchange interaction in the ferrimagnetic structure, owing to a reduction in the bond angles (∠ Fe-O-Fe) of various iron sublattices.
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