Effect of A-site doping on thermal properties of LaGaO3

Parveen, Atahar

doi:10.1016/j.solidstatesciences.2012.03.032

Cited by 10 publications

(6 citation statements)

References 32 publications

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“…Different B-sites doped perovskites were mentioned in the literature showing enhanced catalytic properties like LaNi x Co 1-x O 3 [72], LaB 0.9 Pd 0.1 O 3 [73], LaMn 1−x PdxO 3 [74], BaFe 1−x Y x O 3−δ [75], BaFe 0.85 Cu 0.15 O 3−δ [76], LaNi 1-x Fe x O 3 [77], LaFe 0.95-x Co x Pd 0.05 O 3 [78] and LaCo 0.95 Pd 0.05 O 3 [79]. On the other hand, (La 1-x Sr x ) y MnO 3±δ [80], La 1-x Ce x GaO 3 , La 1-x Pr x GaO 3 and La 1-x Nd x GaO 3 [81], La 1-x Ca x MnO 3 [82], La 1-x Na x MnO 3+δ , La1 -x Ca x MnO 3+δ [83], (Ba 0.93 Fe 0.07 )TiO 3 [84], La 1-x Sr x NiO 3 , and La 1-x Sr x MnO 3 [85] are examples of A-site doped perovskites.…”

Section: Doping Of Perovskitesmentioning

confidence: 99%

Perovskite Nanomaterials – Synthesis, Characterization, and Applications

Atta¹,

Galal²,

El-Ads³

2016

Perovskite Materials - Synthesis, Characterisation, Properties, and Applications

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Inorganic perovskite-type oxides are fascinating nanomaterials for wide applications in catalysis, fuel cells, and electrochemical sensing. Perovskites prepared in the nanoscale have recently received extensive attention due to their catalytic nature when used as electrode modifiers. The catalytic activity of these oxides is higher than that of many transition metals compounds and even some precious metal oxides. They exhibit attractive physical and chemical characteristics such as electronic conductivity, electrically active structure, the oxide ions mobility through the crystal lattice, variations on the content of the oxygen, thermal and chemical stability, and supermagnetic, photocatalytic, thermoelectric, and dielectric properties.Nanoperovskites have been utilized as catalysts in oxygen reduction and hydrogen evolution reactions exhibiting high electrocatalytic activity, lower activation energy, and high electron transfer kinetics. In addition, some perovskites are promising candidates for the development of effective anodic catalysts for direct fuel cells showing high catalytic performance. Moreover, they are recently utilized in electrochemical sensing of alcohols, gases, glucose, H 2 O 2 , and neurotransmitters. They can enhance the catalytic performance in terms of selectivity, sensitivity, unique long-term stability, excellent reproducibility, and anti-interference ability. In addition, organometallic halide perovskites exhibited efficient intrinsic properties for photovoltaic solar cells exhibiting good stability and high efficiency.This chapter introduces a comprehensive coverage of the progress in perovskites research and their applications. Emphasis is given toward several intrinsic properties of perovskites, namely, electronic conductivity, electrically active structure, and electrochemical performance in terms of synthesis routes and stability. The different synthesis methods of the perovskites (coprecipitation, sol-gel, microwave, citrate/ nitrate, etc.) will be summarized in this chapter. The synthesis method affected

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Section: Doping Of Perovskitesmentioning

confidence: 99%

Perovskite Nanomaterials – Synthesis, Characterization, and Applications

Atta¹,

Galal²,

El-Ads³

2016

Perovskite Materials - Synthesis, Characterisation, Properties, and Applications

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“…These materials have been analyzed by several research groups. [22][23][24][25][26][27][28][29][30][31] Theoretically, many calculations on the electronic structure were performed using different methods. [32][33][34][35] Our main goal is to achieve a better understanding of the electronic and magnetic properties of perovskites RGaO 3 (R = La, Ce, Pr, Nd, and Pm).…”

Section: Introductionmentioning

confidence: 99%

Electronic structure and magnetic properties of rare-earth perovskite gallates from first principles

et al. 2017

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The density functional calculation is performed for centrosymmetric (La-Pm) GaO 3 rare earth gallates, using a full potential linear augmented plane wave method with the LSDA and LSDA+U exchange correlation to treat highly correlated electrons due to the very localized 4f orbitals of rare earth elements, and explore the influence of U = 0.478 Ry on the magnetic phase stability and the densities of states. LSDA+U calculation shows that the ferromagnetic (FM) state of RGaO 3 is energetically more favorable than the anti-ferromagnetic (AFM) one, except for LaGaO 3 where the NM state is the lowest in energy. The energy band gaps of RGaO 3 are found to be in the range of 3.8-4.0 eV, indicating the semiconductor character with a large gap.

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“…[1][2][3][4][5] Aside from possible applications for electrolyte of solid fuel, LaGaO 3 has many other potential applications, such as luminescence and thermal potential. [6][7][8][9][10] At room temperature, LaGaO 3 crystal has an ABO 3 perovskite structure with GdFeO 3 -type distortion and falls into the orthorhombical space group Pbnm. [11] GaO 6 octahedra are not aligned along the unit-cell axes.…”

Section: Introductionmentioning

confidence: 99%

“…Parveen et al have studied the thermal properties of La 1−x Ln x GaO 3 (Ln = La, Ce, Nd, Pr). [10] Sood et al studied structural and electronic behavior of Ba-doped LaGaO 3 . [12] Most of these researches are focused experimentally on the photoluminescence, cathodoluminescence and thermal properties, etc., while there is almost no theoretical work on electronic structure and magnetic property for Ln 3+ -doped LaGaO 3 (Ln = rare earth elements) although there are some first-principle researches about effects of doping on physical properties of other systems within density-functional theory.…”

Section: Introductionmentioning

confidence: 99%

First-principle investigation on perovskite La _{1−
x} Eu _x GaO ₃

2016

Chinese Phys. B

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The pseudopotential method has been used to investigate the structural, electronic and magnetic properties of La 1−x Eu x GaO 3 (x = 0, 0.25, 0.5, 0.75, and 1) within the scheme of generalized gradient approximation. The spin-polarized calculations demonstrate that the ground state is an antiferromagnetic insulator for x ≤ 0.5, while it is ferromagnetic halfmetal at x > 0.5. The substitutions of magnetic Eu ions for non-magnetic La ions produce and strength spin polarization, which forcefully urges the system from the insulator to the half metal. Meanwhile, Eu doping strengthens a stoner mechanism for ferromagnetism of La 1−x Eu x GaO 3 (x = 0.75 and 1), which may lead to a rapid increasing in the total magnetic moment and therefore, antiferromagnetic-ferromagnetic transition happens.

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Effect of A-site doping on thermal properties of LaGaO3

Cited by 10 publications

References 32 publications

Perovskite Nanomaterials – Synthesis, Characterization, and Applications

Perovskite Nanomaterials – Synthesis, Characterization, and Applications

Electronic structure and magnetic properties of rare-earth perovskite gallates from first principles

First-principle investigation on perovskite La _{1−
x} Eu _x GaO ₃

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Effect of A-site doping on thermal properties of LaGaO3

Cited by 10 publications

References 32 publications

Perovskite Nanomaterials – Synthesis, Characterization, and Applications

Perovskite Nanomaterials – Synthesis, Characterization, and Applications

Electronic structure and magnetic properties of rare-earth perovskite gallates from first principles

First-principle investigation on perovskite La 1− x Eu x GaO 3

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First-principle investigation on perovskite La _{1−
x} Eu _x GaO ₃