Optimization of dielectric and magnetoresistive response in Nd2-xLaxCe2O7 (0 ≤ x ≤ 2.0) for efficient energy storage applications. (1st November 2022)

• Record Type: Journal Article
• Authors: Quader, Abdul; Mustafa, Ghulam M.; Riaz, Saira; Ramay, Shahid M.; Atiq, Shahid
• Is Part Of: Materials science in semiconductor processing. Volume 150(2022)
• Publication Date: 2022-11-01
• Subjects: Fluorite structure -- Dielectric properties -- Complex impedance -- Complex modulus -- Magnetoresistive coupling; Semiconductors -- Periodicals; Integrated circuits -- Materials -- Periodicals; Semiconducteurs -- Périodiques; Circuits intégrés -- Matériaux -- Périodiques; Electronic journals; 621.38152
• DOI: 10.1016/j.mssp.2022.106916
• Languages: English
• ISSNs: 1369-8001

Abstract

Abstract: Magnetoresistive and temperature-dependent dielectric response of La-substituted Nd2 Ce2 O7 pyrochlores is comprehensively presented in this work. The samples were synthesized using a facile chemical route. Structural investigations confirmed that La-substitution resulted in a slight increase in lattice parameters without any phase transformation of cubic fluorite structure. The credibility of structural information is further affirmed via Rietveld's refined parameters. The spherical-shaped particles with increased agglomeration were revealed in morphological analysis. The elemental purity of all the compositions was verified via energy-dispersive X-ray spectroscopy. The dielectric constant increased significantly by rising temperature from 300 to 500 K. The maximum value of the dielectric constant was noted as 5213 at 500 K for x = 0.8, which highlighted the potential of this composition for energy storage devices, operating at elevated temperatures. When 40% Nd was substituted at La-site, the sample exhibited maximum dispersion in magnetoresistive coupling which revealed the potential of these compositions for magnetoresistive devices. Graphical abstract: Image 1 Highlights: A series of La-substituted Nd2 Ce2 O7 is synthesized using sol–gel auto-combustion route. Fluorite structure remained stable with fine tuning of lattice parameters. Morphological variation and compositional purity is tested thoroughly. Frequency and temperature dependent dielectric behavior is comprehensively discussed. Frequency dependent resistive behavior along with magnetoresistive coupling are exhaustively conferred.