Dielectric relaxation of PrFeO3 nanoparticles

Saha, Sujoy; Chanda, Sunirmal; Dutta, Alo; Sinha, T.P.

doi:10.1016/j.solidstatesciences.2016.05.013

Cited by 12 publications

(2 citation statements)

References 68 publications

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“…have been discussed over the years [13][14][15][16][17][18][19][20] , but most of the work found in the literature focuses only on one or two specific compounds. Only two studies explore the effect of lattice distortion brought by the RE 3+ cation on the vibrational features of these systems: Sudheendra et al 21 followed the thermal evolution of the infrared signatures of RECoO 3 (RE=La, Pr, Nd) systems, while Weber et al 22 focused on the attribution of the Raman signatures of REFeO 3 (RE = La, Sm, Eu, Gd, Tb, Dy) systems.…”

Section: The Vibrational Properties (Experimental and Theoretical) Ofmentioning

confidence: 99%

Experimental and Theoretical Infrared Signatures of REMO₃ (RE = La, Pr, Nd, Sm, and M = Co, Fe) Perovskites

et al. 2018

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The aim of this work is to investigate the consequences of lattice distortion on the vibrational features of rare earth perovskites. To this end, a series of REMO 3 compounds has been synthesized with different rare earths (RE = La, Pr, Nd, Sm) and different transition metals 2 (M=Fe, Co) in order to evaluate their respective role on lattice distortion. Thin films of these materials have been deposited by magnetron co-sputtering in reactive mode and followed by an annealing in air with the same experimental conditions. Characterizations including EDX spectroscopy, X-Ray diffraction and FTIR have been completed by DFT periodic calculations in order to investigate the octahedra tilt angles and to assign the vibrational spectra. The decrease of RE radius enhances the distortion of the chains of octahedra that can be followed both through the calculated mean tilt angle and experimentally by the profile of the M-O-M bending region. The magnitude of the distortion depends on the dimension of the cuboctahedric site hosting the RE that is controlled by the M radius.

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Section: The Vibrational Properties (Experimental and Theoretical) Ofmentioning

confidence: 99%

Experimental and Theoretical Infrared Signatures of REMO₃ (RE = La, Pr, Nd, Sm, and M = Co, Fe) Perovskites

et al. 2018

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“…). The frequency dependence of electrical conductivity 6 can be described through Jonscher's power law [28] and it is defined as, 6 6 >? A 6 @?…”

Section: Electrical Conductivitymentioning

confidence: 99%

Structural, Optical and Electrical Properties of Eu-doped CuS Nanoparticles Synthesized Through the Aqueous Route

Loudhaief¹,

Salem²,

Zouaoui³

2020

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Eu-doped CuS nanoparticles stabilized by L-cysteine were synthesized by a low-temperature soft aqueous route. X-Ray Diffraction (XRD) patterns of the synthesized products reveal the formation of the hexagonal structure of covellite CuS. Scanning Electron Microscopy (SEM) images depict that the as-prepared nanoparticles exhibit relatively sphere like shaped morphology. Transmission Electron Microscopy (TEM) analyses show that the average size of the nanoparticles was found to be reduced with increasing the Eu concentration. UV-Visible optical absorption measurements reveal that the optical band gap is increased with increasing the Eu concentration, showing the presence of a blue shift due to quantum size effects. Impedance spectra were well modelled by introducing an electrical equivalent circuit. The electrical conductivity was found to be increased with increasing the Eu concentration. The temperature dependence of the DC conductivity confirmed the semiconducting nature of the as-prepared nanoparticles and was found to obey the Arrhenius law with two activation energies. The frequency dependence of the AC conductivity has been analyzed by Jonscher's power law suggesting the non-overlapping small polaron tunneling (NSPT) type of conduction. The polaron hopping energy was found to be increased with increasing the Eu concentration. The dielectric constant of the as-synthesized nanoparticles was found to be decreased with the increase in Eu concentration. The dielectric loss tangent was found to be decreased and then increased at higher frequencies with increasing the Eu concentration.

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Structural, optical and electrical studies of Bi2S3 nanoparticles and their impact on the superconducting properties of (Bi,Pb)2Sr2Ca2Cu3Oδ ceramics

Loudhaief

Salem

2021

Appl. Phys. A

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Dielectric relaxation of PrFeO3 nanoparticles

Cited by 12 publications

References 68 publications

Experimental and Theoretical Infrared Signatures of REMO₃ (RE = La, Pr, Nd, Sm, and M = Co, Fe) Perovskites

Experimental and Theoretical Infrared Signatures of REMO₃ (RE = La, Pr, Nd, Sm, and M = Co, Fe) Perovskites

Structural, Optical and Electrical Properties of Eu-doped CuS Nanoparticles Synthesized Through the Aqueous Route

Structural, optical and electrical studies of Bi2S3 nanoparticles and their impact on the superconducting properties of (Bi,Pb)2Sr2Ca2Cu3Oδ ceramics

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Dielectric relaxation of PrFeO3 nanoparticles

Cited by 12 publications

References 68 publications

Experimental and Theoretical Infrared Signatures of REMO3 (RE = La, Pr, Nd, Sm, and M = Co, Fe) Perovskites

Experimental and Theoretical Infrared Signatures of REMO3 (RE = La, Pr, Nd, Sm, and M = Co, Fe) Perovskites

Structural, Optical and Electrical Properties of Eu-doped CuS Nanoparticles Synthesized Through the Aqueous Route

Structural, optical and electrical studies of Bi2S3 nanoparticles and their impact on the superconducting properties of (Bi,Pb)2Sr2Ca2Cu3Oδ ceramics

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Product

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Experimental and Theoretical Infrared Signatures of REMO₃ (RE = La, Pr, Nd, Sm, and M = Co, Fe) Perovskites

Experimental and Theoretical Infrared Signatures of REMO₃ (RE = La, Pr, Nd, Sm, and M = Co, Fe) Perovskites