Giant dielectric response and polaronic hopping in Al-substituted A5/3Sr1/3NiO4 (A=La, Nd) ceramics

Wang, J.; Liu, G.; Jia, Bo; Liu, X.Q.; Chen, X.M.

doi:10.1016/j.ceramint.2013.10.150

Cited by 15 publications

(10 citation statements)

References 19 publications

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“…Dong et al [24] reported a significant improvement of the dielectric properties of Mg 2+ /Ta 5+ codoped TiO 2 ceramics, which were described by the formation of the EPDDs. According to the previous works, the internal barrier layer capacitor (IBLC) [25][26][27], surface barrier layer capacitor (SBLC) [15,28,29], and small polaron hopping models [30,31] were also proposed to be the primary origins of the giant dielectric properties of the Ga 3+ /Ta 5+ , Al 3+ /Ta 5+ , and In 3+ /Nb 5+ codoped TiO 2 ceramics. Furthermore, broad-band dielectric spectroscopy up to the THz IR range showed that the giant dielectric response in codoped TiO 2 ceramics was clearly attributed to the IBLC effect [32,33].…”

Section: Introductionmentioning

confidence: 99%

Origins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg1/3Ta2/3)0.01Ti0.99O2 Ceramic

et al. 2021

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The Mg2+/Ta5+ codoped rutile TiO2 ceramic with a nominal composition (Mg1/3Ta2/3)0.01Ti0.99O2 was synthesized using a conventional solid-state reaction method and sintered at 1400 °C for 2 h. The pure phase of the rutile TiO2 structure with a highly dense microstructure was obtained. A high dielectric permittivity (2.9 × 104 at 103 Hz) with a low loss tangent (<0.025) was achieved in the as-sintered ceramic. After removing the outer surface, the dielectric permittivity of the polished ceramic increased from 2.9 × 104 to 6.0 × 104, while the loss tangent also increased (~0.11). The dielectric permittivity and loss tangent could be recovered to the initial value of the as-sintered ceramic by annealing the polished ceramic in air. Notably, in the temperature range of −60–200 °C, the dielectric permittivity (103 Hz) of the annealed ceramic was slightly dependent (<±4.4%), while the loss tangent was very low (0.015–0.036). The giant dielectric properties were likely contributed by the insulating grain boundaries and insulative surface layer effects.

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Section: Introductionmentioning

confidence: 99%

Origins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg1/3Ta2/3)0.01Ti0.99O2 Ceramic

et al. 2021

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“…However, some authors claim that intrinsic effect, i.e., small polaronic hopping and hence charge ordering is responsible for the colossal dielectric constant (CDC) [122][123][124]. There is also another group of authors, who believe that both intrinsic as well as extrinsic effects are responsible for CDC in different range of temperature and frequencies [17,[124][125][126]. Dielectric properties of La NiO oxide have been further modified by substituting different alkaline earth metals (Ca, Sr, and Ba) at La site.…”

Section: Similar To Nd Sr Niomentioning

confidence: 99%

“…The dielectric properties of La / Sr / NiO are superior to other colossal dielectric materials, including most investigated CaCu Ti O (CCTO). Wang et al [126] studied dielectric properties of the A / Sr / Ni Al O (A = La, Nd; = 0.2, 0.3) solid solution. They ascribed giant dielectric response of composition with = 0.3 to the adiabatic small polaronic hopping process, because the value of activation energy of dielectric relaxation and bulk electrical conduction is very close.…”

Section: Songmentioning

confidence: 99%

Ruddlesden-Popper phase A2BO4 oxides: Recent studies on structure, electrical, dielectric, and optical properties

2020

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In the last two decades, structure and properties of Ruddlesden-Popper phase (RP) A 2 BO 4 oxides with K 2 NiF 4 structure, have been widely investigated. But to the best of our knowledge, no review article is available in the literature on recent studies on these oxides. Therefore, in this article, recent studies on structure, electrical, dielectric, and optical properties of these oxides have been reviewed. Special attention is put on to highlight the effect of doping and oxygen stoichiometry on the structure and properties of these oxides. Further, important applications of these oxides have also been mentioned in this article.

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“…Sm 1.5 Sr 0.5 NiO 4 is a K 2 NiF 4 type of material [8][9][10][11] that, through doping mechanism, has high dielectric constant values (10 4 ) with considerable low dielectric loss (0.1 magnitude) with good temperature stability [19,20]. Such high values of dielectric constant were attained through hopping mechanism between the highly resistive grain boundaries and grains [21].…”

Section: Introductionmentioning

confidence: 99%

Steady nature of dielectric behaviour in Sm1.5Sr0.5NiO4 – CCTO composites

Abraham¹,

Thomas²,

Thomas³

et al. 2019

MoEM

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The composite materials of 0.5 Sm1.5Sr0.5NiO4, 0.5 CCTO and 0.75 Sm1.5Sr0.5NiO4, 0.25 CCTO mixtures were prepared through the conventional solid state reaction in an attempt to obtain good dielectric properties for practical applications. The structural properties were determined by powder X-ray diffraction and single phases were obtained for Sm1.5Sr0.5NiO4 and CaCu3Ti4O12 compounds. The dielectric studies analysed over a range of frequencies (100 KHz–10 MHz) and temperatures (30 to 200 °C) revealed a desired dielectric constant values with a low steady nature of dielectric loss factor. Through impedance spectroscopy, the attained dielectric behaviour was due to the highly insulating grain boundaries at lower frequencies and semiconducting grains at higher frequencies.

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Giant dielectric response and polaronic hopping in Al-substituted A5/3Sr1/3NiO4 (A=La, Nd) ceramics

Cited by 15 publications

References 19 publications

Origins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg1/3Ta2/3)0.01Ti0.99O2 Ceramic

Origins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg1/3Ta2/3)0.01Ti0.99O2 Ceramic

Ruddlesden-Popper phase A2BO4 oxides: Recent studies on structure, electrical, dielectric, and optical properties

Steady nature of dielectric behaviour in Sm1.5Sr0.5NiO4 – CCTO composites

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