Journal ArticleDOI
Synthesis and ferroelectric properties of bismuth layer-structured (Bi7−xSrx)(Fe3−xTi3+x)O21 solid solutions
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TLDR
In this article, a single-phase Bismuth layer-structured (Bi 7− x Sr x )(Fe 3− x Ti 3+ x )O 21 (BSFT) ceramics were synthesized and the ferroelectric properties and crystal structure were investigated.Abstract:
Bismuth layer-structured (Bi 7− x Sr x )(Fe 3− x Ti 3+ x )O 21 (BSFT) ceramics were synthesized and the ferroelectric properties and crystal structure were investigated. X-ray powder diffraction profiles and refinement of the lattice parameters indicated single phase BSFT was obtained in the composition range 0–1.5. The lattice parameter b of BSFT remained almost constant, while a slight decrease in the lattice parameter a was observed by the Sr and Ti substitution for Bi and Fe, respectively, which indicated an increase in the orthorhombicity. The dependence of the BSFT lattice parameter on temperature implied a phase transition from the orthorhombic to the tetragonal phase, which was in good agreement with the Curie temperature. The remnant polarization P r , of BSFT was significantly improved by the Sr and Ti substitution for Bi and Fe, and ranged from 9 to 16 μC/cm 2 , although no remarkable variation in the coercive field E c was observed. As a result, a well-saturated P – E hysteresis loop of BSFT ceramic was obtained at x =0.5 with a P r of 30 μC/cm at an applied voltage of 280 kV/cm.read more
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Synthesis of Ni-substituted Bi7Fe3Ti3O21 ceramics and their superior room temperature multiferroic properties
Shujie Sun,Yihan Ling,Ranran Peng,Min Liu,Xiangyu Mao,Chen Xiaobing,Randy Knize,Yalin Lu,Yalin Lu +8 more
TL;DR: In this article, layer-structured bismuth complex oxides (BFNT) were synthesized using a low-temperature combustion synthesis method and X-ray diffraction patterns and high-resolution transmission electron microscopy analysis indicated that the samples presented a six-layer Aurivillius structure.
Journal ArticleDOI
Ferroelectric and ferromagnetic properties of Bi7−xLaxFe1.5Co1.5Ti3O21 ceramics prepared by the hot-press method
Zhiwei Lei,Yan Huang,Min Liu,Wen Ge,Yihan Ling,Ranran Peng,Xiangyu Mao,Xiaobing Chen,Yalin Lu,Yalin Lu +9 more
TL;DR: In this paper, the effect of La substitution on 2 Pr and 2 Mr was also discussed, and the results indicated that the leakage current does not play a big role in the synthesis of BLFCT ceramics.
Journal ArticleDOI
Structural Evolution and Multiferroics in Sr-Doped Bi7Fe1.5Co1.5Ti3O21 Ceramics
TL;DR: In this article, a citrate-nitrate combustion method was used to obtain a pure Aurivillius phase SBFCT with a layer number of n ǫ = 6 when x ≥ 0.25, and then the structure collapsed to 5 layers for x à = 0.50, and finally 4 layers for X à à ≥ 1.00.
Journal ArticleDOI
Structural transformation and multiferroic properties in Gd-doped Bi7Fe3Ti3O21 ceramics
TL;DR: In this article, the gadolinium doping was used to enhance the magnetic response of the Bismuth layer-structured Bi7−xGdxFe3Ti3O21 (0.00 ≤ x ≤ 1.50) ceramics.
Journal ArticleDOI
Progress and Perspectives on Aurivillius-Type Layered Ferroelectric Oxides in Binary Bi4Ti3O12-BiFeO3 System for Multifunctional Applications
Shujie Sun,Xiaofeng Yin +1 more
TL;DR: In this paper, the characteristics of Aurivillius-phase layered structure and recent progress in the field of synthesis of such materials with various architectures are discussed, and some research hotspots on magnetoelectric effect, catalytic activity, microwave absorption, and photovoltaic effect for promising applications.
References
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On the Thermodynamic Stability of BiFeO3
TL;DR: In this article, the thermodynamic stability of BiFeO3 was investigated by high temperature X-ray diffraction and isothermal heat treatment of Bi2O3−Fe 2O3 powder mixture as well as phase pure BiO3 prepared by a wet chemical route.
Journal ArticleDOI
Crystal and electronic structures of Bi4−xLaxTi3O12 ferroelectric materials
Yuichi Shimakawa,Yoshimi Kubo,Y. Tauchi,Hidefumi Asano,Takashi Kamiyama,Fujio Izumi,Zenji Hiroi +6 more
TL;DR: In this paper, the crystal structures of Bi4Ti3O12 and Bi325La075Ti 3O12 were refined by neutron powder diffraction and large structural distortions were revealed, and ferroelectric polarizations along the a and c axes were calculated from the displacements of the constituent ions.