Magnetic field driven dielectric relaxation in non-magnetic composite medium: A low temperature study

Maity, Krishna Prasad; Patra, Ananya; Tanty, Narendra; Prasad, V.

doi:10.1016/j.matchemphys.2022.126486

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Magnetic field-dependent dielectric resonance effects have been seen in nanoporous silicon , and La 2/3 Ca 1/3 MnO 3 consistent with expectations from the generalization of the Maxwell–Wagner capacitor model . Magneto-dielectric coupling has also been reported in phase-separated media, − but there has been no direct evidence of magnetocapacitance yet reported in these systems. More direct experimental validation of magnetocapacitance effects have been observed in nonmultiferroic graphene oxide, metal to semiconductor interfaces, and complex oxides.…”

Section: Introductionmentioning

confidence: 53%

Magnetocapacitance at the Ni/BiInO₃ Schottky Interface

Viswan,

Wang,

Streubel

et al. 2024

ACS Appl. Mater. Interfaces

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We report the observation of a magnetocapacitance effect at the interface between Ni and epitaxial nonpolar BiInO 3 thin films at room temperature. A detailed surface study using X-ray photoelectron spectroscopy (XPS) reveals the formation of an intermetallic Ni−Bi alloy at the Ni/BiInO 3 interface and a shift in the Bi 4f and In 3d core levels to higher binding energies with increasing Ni thickness. The latter infers band bending in BiInO 3 , corresponding to the formation of a p-type Schottky barrier. The current−voltage characteristics of the Ni/BiInO 3 /(Ba,Sr)RuO 3 / NdScO 3 (110) heterostructure show a significant dependence on the applied magnetic field and voltage cycling, which can be attributed to voltage-controlled band bending and spin-polarized charge accumulation in the vicinity of the Ni/BiInO 3 interface. The magnetocapacitance effect can be realized at room temperature without involving multiferroic materials.

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Section: Introductionmentioning

confidence: 53%

Magnetocapacitance at the Ni/BiInO₃ Schottky Interface

Viswan,

Wang,

Streubel

et al. 2024

ACS Appl. Mater. Interfaces

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Suppressing Nonradiative Recombination through Dielectric Screening of Defects in Crystalline Carbon Nitride for Enhanced Photocatalytic Activity

Zhang,

Xu,

Zhang

et al. 2024

ACS Nano

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Abundant defect-induced nonradiative recombination greatly reduces the charge separation efficiency in photocatalysts. Dielectric screening of defects has been proven to be an effective strategy to improve the charge separation efficiency; however, it has been rarely reported in photocatalysis. Here, a developed calcium poly(heptazine imide) (CaPHI) is utilized as a model photocatalyst to explore the dielectric screening of defects. Through embedding potassium ions in CaPHI, the dipole moment and polarity of the PHI structure are increased, thus enhancing the dielectric constant and enabling the dielectric screening of defects. In addition, compared to the original CaPHI, the optimized Ca/KPHI exhibits a 79.3% reduction in defect capture cross-section, and a decrease in the nonradiative recombination rate from 0.6224 to 0.1452 ns–1, thus achieving an apparent quantum efficiency of 51.4% for H2 production at 420 nm. This proposed dielectric screening strategy effectively addresses the issue of slow carrier transport and separation caused by defect-induced nonradiative recombination in photocatalysts.

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Synthesis of sodium silicate and its application of dielectric relaxation spectroscopy — A report

Chakraborty,

Sheikh

2024

J. Micromech. Mol. Phys.

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This study aims to explain the dielectric relaxation in sodium silicate (Na2SiO3) and its direct dependence on temperature across various frequencies. The study examines and elucidates the involvement of various types of polarization in the thermo-active dielectric relaxation process. Both low-frequency dielectric dispersion and complex impedance play pivotal roles in controlling the thermo-active dielectric relaxation process. Utilizing complex data plots, the study actively, and prominently illustrates the relaxation process.

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Magnetic field driven dielectric relaxation in non-magnetic composite medium: A low temperature study

Cited by 3 publications

References 19 publications

Magnetocapacitance at the Ni/BiInO₃ Schottky Interface

Magnetocapacitance at the Ni/BiInO₃ Schottky Interface

Suppressing Nonradiative Recombination through Dielectric Screening of Defects in Crystalline Carbon Nitride for Enhanced Photocatalytic Activity

Synthesis of sodium silicate and its application of dielectric relaxation spectroscopy — A report

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Magnetic field driven dielectric relaxation in non-magnetic composite medium: A low temperature study

Cited by 3 publications

References 19 publications

Magnetocapacitance at the Ni/BiInO3 Schottky Interface

Magnetocapacitance at the Ni/BiInO3 Schottky Interface

Suppressing Nonradiative Recombination through Dielectric Screening of Defects in Crystalline Carbon Nitride for Enhanced Photocatalytic Activity

Synthesis of sodium silicate and its application of dielectric relaxation spectroscopy — A report

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Magnetocapacitance at the Ni/BiInO₃ Schottky Interface

Magnetocapacitance at the Ni/BiInO₃ Schottky Interface