Influence of lanthanum distribution on dielectric and ferroelectric properties of BaBi 4-x La x Ti 4 O 15 ceramics

Khokhar, Anita; Goyal, P. K.; Thakur, O. P.; Shukla, Anoop Kumar; Sreenivas, K.

doi:10.1016/j.matchemphys.2014.11.074

Cited by 51 publications

(25 citation statements)

References 67 publications

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“…The main high‐frequency modes v 5 and v 11 almost remain unchanged. Some literatures have suggested that the frequency shift at high‐frequency modes was strongly related to the stretching from the oxygen octahedron . As long as doping ions are not introduced into the rigid (Bi 2 O 2 ) 2+ layers, the stretching mode will remain unchanged, but once the rigid layer mode is affected, the TiO 6 octahedra linked to Bi 2 O 2 layer tends to expand or shrink, which correspondingly influences the binding energy in TiO 6 thus resulting in the vibrational frequency shift.…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence, Structural, and Electrical Properties of Erbium‐Doped Na_0.5Bi_4.5Ti₄O₁₅ Ferroelectric Ceramics

Jiang

Chen

et al. 2016

J. Am. Ceram. Soc.

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Structural, electrical, and up-conversion (UC) properties of Na 0.5 Bi 4.5-x Er x Ti 4 O 15 (NBT-xEr 3+ ) (0.00 < x < 0.40) ceramics have been studied. All the ceramic samples possessed a single-phase orthorhombic structure. The unit cell volume, the lattice parameters a, b, and c, and orthorhombic distortion analyzed on the basis of Rietveld refinement were observed to decrease with increasing Er 3+ contents (x). The average values of grain size were found to slightly decrease with increasing x. Raman spectroscopy revealed that (Bi 2 O 2 ) 2+ layers remained unaffected in the modified compositions, and Er 3+ substitution for Bi 3+ occurred predominantly at the A-site in the perovskite blocks causing the cationic disorder and a slight decrease in the TiO 6 octahedral distortion. NBT-xEr 3+ ceramic with x = 0.20 achieved the optimized photoluminescence. The relative intensity of green and red UC emissions could be tuned by changing Er 3+ ions concentrations. Ferroelectric measurements revealed that Er 3+ doping led to reduction in 2P r and 2E c . However, dielectric measurements showed that the incorporation of Er 3+ ions increased T c with simultaneously lowered tand at high temperature, implying that this ceramics can be suitable for high-temperature sensor applications.

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Section: Resultsmentioning

confidence: 99%

Photoluminescence, Structural, and Electrical Properties of Erbium‐Doped Na_0.5Bi_4.5Ti₄O₁₅ Ferroelectric Ceramics

Jiang

Chen

et al. 2016

J. Am. Ceram. Soc.

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“…The Raman modes observed above 500 cm -1 are related to the internal stretching and bending vibrations of the TiO 6 octahedra [20][21][22]. For comparison, the observed phonon modes for all the thin films are assigned in Table 1.…”

Section: Resultsmentioning

confidence: 99%

Microstructural and ferroelectric properties of rare earth (Ce, Pr, and Tb)-doped Na0.5Bi4.5Ti3O15 thin films

Raghavan

Kim

Song

et al. 2015

Applied Surface Science

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“…Khokhar et al (2015) Sampel dikarakterisasi dengan difraksi sinar-X (tipe Simadzu XRD 7000 dengan sumber Cu-Kα). Refinement struktur dilakukan dengan teknik Le Bail menggunakan program Rietica (Hunter, 2000).…”

Section: Pendahuluanunclassified

Sintesis Senyawa Aurivillius Ca1-xBi3,5+xLa0,5Ti4-xMnxO15: Struktur dan Sifat Dielektrik

et al. 2018

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ABSTRAKSintesis senyawa feroelektrik yang berbasis fasa Aurivillius berlapis empat (n = 4) yang didadah kation La 3+ dan Mn 3+ , Ca 1-x Bi 3,5+x La 0,5 Ti 4-x Mn x O 15 dengan x = 0; 0,2; 0,4; 0,6; 0,8 dan 1 telah dilakukan dengan teknik lelehan garam. Karakterisasi produk dengan difraksi sinar-X (XRD) menunjukkan bahwa fasa tunggal Aurivillius ditunjukkan oleh sampel dengan x = 0; 0,2; 0,4 dan 0,6. Refinement struktur dengan teknik Le Bail diketahui bahwa senyawa Aurivillius yang terbentuk sesuai dengan simetri ortorombik dan grup ruang A2 1 am. Analisis dengan Scanning Electron Microscopy (SEM) untuk semua sampel memperlihatkan morfologi sampel berupa lempengan yang merupakan ciri khas senyawa Aurivillius. Nilai konstanta dielektrik sampel dan konduktivitasnya mengalami kenaikan dengan meningkatnya x. Konduktivitas paling tinggi dimiliki oleh sampel x = 0,2 yang diperkirakan akibat adanya interaksi pertukaran ganda (double exchange) antara Mn 3+ dan Mn 4+ . Morphology analysis by scanning electron microscopy (SEM) for all samples shows the plate-like as the characteristic of Aurivillius compounds. The value of dielectric constant and conductivity of the samples increases as increase of x. The conductivity of x = 0.2 is the highest predicted due to the interaction of double exchange between Mn 3+ and Mn 4+ . Kata

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Influence of lanthanum distribution on dielectric and ferroelectric properties of BaBi 4-x La x Ti 4 O 15 ceramics

Cited by 51 publications

References 67 publications

Photoluminescence, Structural, and Electrical Properties of Erbium‐Doped Na_0.5Bi_4.5Ti₄O₁₅ Ferroelectric Ceramics

Photoluminescence, Structural, and Electrical Properties of Erbium‐Doped Na_0.5Bi_4.5Ti₄O₁₅ Ferroelectric Ceramics

Microstructural and ferroelectric properties of rare earth (Ce, Pr, and Tb)-doped Na0.5Bi4.5Ti3O15 thin films

Sintesis Senyawa Aurivillius Ca1-xBi3,5+xLa0,5Ti4-xMnxO15: Struktur dan Sifat Dielektrik

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Influence of lanthanum distribution on dielectric and ferroelectric properties of BaBi 4-x La x Ti 4 O 15 ceramics

Cited by 51 publications

References 67 publications

Photoluminescence, Structural, and Electrical Properties of Erbium‐Doped Na0.5Bi4.5Ti4O15 Ferroelectric Ceramics

Photoluminescence, Structural, and Electrical Properties of Erbium‐Doped Na0.5Bi4.5Ti4O15 Ferroelectric Ceramics

Microstructural and ferroelectric properties of rare earth (Ce, Pr, and Tb)-doped Na0.5Bi4.5Ti3O15 thin films

Sintesis Senyawa Aurivillius Ca1-xBi3,5+xLa0,5Ti4-xMnxO15: Struktur dan Sifat Dielektrik

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Photoluminescence, Structural, and Electrical Properties of Erbium‐Doped Na_0.5Bi_4.5Ti₄O₁₅ Ferroelectric Ceramics

Photoluminescence, Structural, and Electrical Properties of Erbium‐Doped Na_0.5Bi_4.5Ti₄O₁₅ Ferroelectric Ceramics