Low-frequency and microwave dielectric properties of Ba2LnTaO6 (Ln = La, Pr, Sm, Dy, Ce, Gd, Nd, Tm, Tb) ceramics

Korchagina, S. K.; Shevchuk, Yu. A.

doi:10.1134/s0020168506010134

Cited by 24 publications

(8 citation statements)

References 6 publications

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“…BLT was synthesized using a more efficient method, an optimized version of previously reported high-temperature synthesis method that greatly reduces the synthesis time [14,16,17]. The detailed preparation process is given in Figure 1a As shown in Figure 1a, BaCO 3 (99.9%, 0.002 mol, Sinopharm Chemical Reagent Co., Ltd, Shanghai, China), La 2 O 6 (99.99%, 0.0005 mol, Sinopharm Chemical Reagent Co., Ltd.), and Ta 2 O 5 (99.99%, 0.0005 mol, Sinopharm Chemical Reagent Co. Ltd) were mixed and ground with a pestle in an agate mortar for 20 min in order to increase the contact area.…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

“…In 2001, Doi et al reported BLT was Van Vleck paramagnetic down to 5 K. This led to application potentials in the direction of electron paramagnetic resonance imaging [16]. In 2006, Korchagina et al reported the characterization of BLT and confirmed the relationship of its low-frequency and microwave dielectric properties with the ionic radii of constituent lanthanide cations [17]. In 2014, Kumari et al successfully obtained the bandgap of BLT as 2.03 eV and the dielectric relaxation described an unchanged mechanism at different temperatures [14].…”

Section: Introductionmentioning

confidence: 99%

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Double Perovskite Ba2LaTaO6 for Ultrafast Fiber Lasers in Anomalous and Normal Net Dispersion Regime

et al. 2022

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Double perovskites (DPs) have been attracting attention in an assortment of optoelectronic applications, for they hold advantages such as high quantum efficiency, long carrier migration distance and strong linear and nonlinear absorptions. As specific kinds of perovskites (PVKs), DPs are gifted with orthorhombic crystal structures which provide rich conversion combinations and broaden the space for research and application. However, few works have been reported about DPs in ultrafast photonics applications. In this article, a DP with chemical formula of Ba2LaTaO6 (BLT) was successfully synthesized by high-temperature solid phase method. The microstructures and morphologies were observed, and the linear and nonlinear absorption were characterized. By first using BLT as a novel saturable absorber in both normal and anomalous dispersion region fiber lasers, dual-wavelength soliton and dissipative soliton were successfully operated at C-band. This study affirms BLT’s nonlinear optical properties, lays the foundation for optical research on BLT, and meanwhile provides a meaningful reference for future development of pulsed lasers based on DPs.

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Section: Synthesis and Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Double Perovskite Ba2LaTaO6 for Ultrafast Fiber Lasers in Anomalous and Normal Net Dispersion Regime

et al. 2022

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“…Ba‐, Sr‐, and Ca‐based double perovskite oxides (DPOs) have been widely investigated for applications in microwave resonators and filters . Vibrational studies of the crystal structures and phonon modes of such DPOs using Raman scattering and infrared spectroscopy have been reported by Dias et al .…”

Section: Introductionmentioning

confidence: 99%

“…B A-, Sr-, and Ca-based double perovskite oxides (DPOs) have been widely investigated for applications in microwave resonators and filters. [1][2][3][4][5][6][7] Vibrational studies of the crystal structures and phonon modes of such DPOs using Raman scattering and infrared spectroscopy have been reported by Dias et al [8][9][10][11][12] Recently, in this series, we have investigated the frequency-dependent dielectric properties of A 2 GdTaO 6 (A = Ba, Sr, Ca). [13][14][15] In this study, we concentrate on the structural, vibrational, and dielectric properties of A 2 SmTaO 6 (AST) compounds.…”

Section: Introductionmentioning

confidence: 99%

“…However, Korchagina et al have reported monoclinic structure of it. 19 Doi et al 20 have also studied the magnetic properties of BST with monoclinic structure. To resolve this controversy we have synthesized BST along with two other DPOs, SST, and CST, carried out their X-ray diffraction (XRD) measurements and analyzed their crystal structures.…”

Section: Introductionmentioning

confidence: 99%

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Dielectric Relaxation and Collective Vibrational Modes of Double‐Perovskites A₂SmTaO₆ (A = Ba, Sr and Ca)

2014

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The crystal structures of the double‐perovskite oxide A2SmTaO6 series (AST, A = Ba, Sr, Ca) synthesized by solid‐state reaction technique are determined from X‐ray powder diffraction data. Rietveld refinements of the X‐ray diffraction data of the samples show that Ba2SmTaO6 (BST) crystallizes in cubic phase and Sr2SmTaO6 (SST) and Ca2SmTaO6 (CST) crystallize in monoclinic phase. Fourier transform infrared spectra show two primary modes of the samples at around 370 and 600 cm−1. The vibrational properties of the samples are studied by Raman spectroscopy taken at 488‐nm wavelength. Group‐theoretical study is performed to assign the different vibrational modes of the samples in accordance with structural symmetry. The observed shifts of some vibrations in the SST and CST w.r.t. BST upon changing the A cation are tentatively explained. Dielectric spectroscopy is applied to investigate the ac electrical conductivity of AST in different temperatures between 303 and 673 K and in a frequency range of 42 Hz–1 MHz. The complex impedance plane plots show that the relaxation (conduction) mechanism in these materials is purely a bulk effect arising from the semiconductive grains. The relaxation mechanism of the samples is modeled by Cole–Cole equation. The frequency‐dependent conductivity spectra are found to follow the power law.

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Magneto‐Optoelectronic Investigation of Rare Earth‐Based Ba₂Dy(Ta,Bi)O₆ Double Perovskites

Ishfaq,

Nasarullah,

Aldaghfag

et al. 2025

Physica Status Solidi (b)

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Herein, two barium‐based double perovskites, Ba2DyTaO6 and Ba2DyBiO6, have been investigated using density functional theory with the modified Becke–Johnson potential to explore their geometric, magnetic, and optoelectronic attributes. The calculations, including formation enthalpies and tolerance factors, confirm structural and thermodynamic stability of both compounds. The results reveal half‐metallic behavior, with a bandgap present in spin‐up channel and metallic bands in the spin‐down channel for both materials. Specifically, Ba2DyTaO6 exhibits a spin‐up bandgap of 4.60 eV, while Ba2DyBiO6 has 3.0 eV in the spin‐up channel, indicating their semiconducting nature in this spin orientation. Magnetic properties are dominated by the Dy‐4f states, yielding a stable ferromagnetic nature with a magnetic moment around 5.0 μB. Both compounds display strong absorbance in the UV spectrum, regarding these double perovskites as promising contenders for optical devices, UV filters, and spintronic applications. The study highlights the potential of these materials in combining optical and magnetic properties for multifunctional device applications.

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Low-frequency and microwave dielectric properties of Ba2LnTaO6 (Ln = La, Pr, Sm, Dy, Ce, Gd, Nd, Tm, Tb) ceramics

Cited by 24 publications

References 6 publications

Double Perovskite Ba2LaTaO6 for Ultrafast Fiber Lasers in Anomalous and Normal Net Dispersion Regime

Double Perovskite Ba2LaTaO6 for Ultrafast Fiber Lasers in Anomalous and Normal Net Dispersion Regime

Dielectric Relaxation and Collective Vibrational Modes of Double‐Perovskites A₂SmTaO₆ (A = Ba, Sr and Ca)

Magneto‐Optoelectronic Investigation of Rare Earth‐Based Ba₂Dy(Ta,Bi)O₆ Double Perovskites

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Low-frequency and microwave dielectric properties of Ba2LnTaO6 (Ln = La, Pr, Sm, Dy, Ce, Gd, Nd, Tm, Tb) ceramics

Cited by 24 publications

References 6 publications

Double Perovskite Ba2LaTaO6 for Ultrafast Fiber Lasers in Anomalous and Normal Net Dispersion Regime

Double Perovskite Ba2LaTaO6 for Ultrafast Fiber Lasers in Anomalous and Normal Net Dispersion Regime

Dielectric Relaxation and Collective Vibrational Modes of Double‐Perovskites A2SmTaO6 (A = Ba, Sr and Ca)

Magneto‐Optoelectronic Investigation of Rare Earth‐Based Ba2Dy(Ta,Bi)O6 Double Perovskites

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Dielectric Relaxation and Collective Vibrational Modes of Double‐Perovskites A₂SmTaO₆ (A = Ba, Sr and Ca)

Magneto‐Optoelectronic Investigation of Rare Earth‐Based Ba₂Dy(Ta,Bi)O₆ Double Perovskites