Observation of unusual Griffith’s phase behavior in quadruple perovskite oxide CaCu3Mn4O12 (CCMO) synthesized through chemical route

Kumar, Vinod; Kumar, Arun; Verma, Manisha; Singh, Shruti; Pandey, Santosh; Singh, Laxman; Singh, Neha; Mandal, K. D.

doi:10.1016/j.arabjc.2020.01.003

Cited by 15 publications

(4 citation statements)

References 32 publications

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“…The Cu + , Cu 2+ , Ti 3+ , and Ti 4+ subpeaks are located in the range of 931.70–932.28, 933.47–935.08, 456.84–463.00, and 457.68–464.08 eV, respectively. This result is in agreement with previous studies 50–52 . The fitted curve of the XPS spectrum of O is shown in Figure 6D,J.…”

Section: Resultssupporting

confidence: 93%

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Extremely enhanced thermal stability of Y_2/3Cu₃Ti₄O₁₂ ceramics by a Pechini method

Wei

et al. 2022

J Am Ceram Soc.

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Y 2/3 Cu 3 Ti 4 O 12 ceramic is a novel semiconductor with potential applications in electronic devices. However, its resistance drift and surface structure defects limit the application for negative temperature coefficient thermistor devices. A comparative study of solid-phase and a Pechini processing of Y 2/3 Cu 3 Ti 4 O 12 is presented in this paper, in the particular comparative study of stability. The Pechini method is found to be effective in lowering sintering temperature and improving thermal stability (ΔR/R 0 < 0.3%) in comparison with solid-phase method. The origin of the stability deterioration is related to the oxidation state of Cu ions and the migration of sublattice. The Pechini method overcomes stoichiometric ratio deviations and cation vacancy diffusion, thus reducing metal ion segregation in a continuous high-temperature environment and thereby showing unique insensitivity to oxygen. The important role of the Pechini method in improving thermal stability is revealed, which is expected to be used in the preparation of high stability electron devices.

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Section: Resultssupporting

confidence: 93%

“…This result is in agreement with previous studies. [50][51][52] The fitted curve of the XPS spectrum of O is shown in Figure 6D,J Table 3. The concentration ratios were calculated using the approximate equation:…”

Section: Xps Analysismentioning

confidence: 99%

Extremely enhanced thermal stability of Y_2/3Cu₃Ti₄O₁₂ ceramics by a Pechini method

Wei

et al. 2022

J Am Ceram Soc.

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“…The O 1s spectrum (Figure d) shows the peaks at 532.2, 532.8, and 533.1 eV assigned to the SO 4 2– and −OH groups, respectively . The Ca 2p spectrum (Figure e) shows peaks at 348.7 and 352.0 eV that are allocated to Ca 2p 1/2 and Ca 2p 3/2 for Ca 2+ Figure f illustrates the one peak of S located at 170.2 eV that can be assigned to S 2p 3/2 …”

Section: Resultsmentioning

confidence: 98%

“…34 The Ca 2p spectrum (Figure 4e) shows peaks at 348.7 and 352.0 eV that are allocated to Ca 2p 1/2 and Ca 2p 3/2 for Ca 2+ . 38 Figure 4f illustrates the one peak of S located at 170.2 eV that can be assigned to S 2p 3/2 . 39 Figure S3 shows the (a) XPS survey spectrum of CaSO 4 NPs and the spectra of (b) Ca 2p 1/2 and Ca 2p 3/2 , (c) S 2p, and (d) O 1s.…”

Section: Synthesis Of Mpg-c 3 N 4 and Mpg-c 3 N 4 -Casomentioning

confidence: 99%

Construction of Waste Chalk Powder into mpg-C₃N₄-CaSO₄ as an Efficient Photocatalyst for Dye Degradation under UV–Vis Light and Sunlight

et al. 2023

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In this article, we present the synthesis of calcium sulfate nanoparticles (CaSO 4 NPs) from waste chalk powder by the calcination method. These CaSO 4 NPs were utilized for the construction of a mesoporous graphitic carbon nitride-calcium sulfate (mpg-C 3 N 4 -CaSO 4 ) photocatalyst. Synthesized materials were confirmed by several characterization techniques. The photocatalytic performance of the synthesized samples was tested by the degradation of methylene blue (MB) in the presence of both UV−vis light and sunlight. The efficiency of photocatalytic degradation of MB dye using the optimized mpg-C 3 N 4 -CaSO 4 -2 composite reached 91% within 90 min in the presence of UV−vis light with superb photostability and recyclability after five runs compared to individual mpg-C 3 N 4 and CaSO 4 NPs and reached 95% within 120 min under sunlight. Histotoxicological studies on fish liver and ovary indicated that the dye containing the solution damaged the structure of the liver and ovary tissues, whereas the photodegraded solution of MB was found to be less toxic and caused negligible alterations in their typical structure similar to the control group.

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The emergence of Griffiths phase in CaCu3Ti(4−x)MnxO12 (CCTMO, x = 1, 2 and 3) geometrically frustrated antiferromagnetic complexes perovskite

Kumar,

Singh

et al. 2024

J Mater Sci: Mater Electron

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Observation of unusual Griffith’s phase behavior in quadruple perovskite oxide CaCu3Mn4O12 (CCMO) synthesized through chemical route

Cited by 15 publications

References 32 publications

Extremely enhanced thermal stability of Y_2/3Cu₃Ti₄O₁₂ ceramics by a Pechini method

Extremely enhanced thermal stability of Y_2/3Cu₃Ti₄O₁₂ ceramics by a Pechini method

Construction of Waste Chalk Powder into mpg-C₃N₄-CaSO₄ as an Efficient Photocatalyst for Dye Degradation under UV–Vis Light and Sunlight

The emergence of Griffiths phase in CaCu3Ti(4−x)MnxO12 (CCTMO, x = 1, 2 and 3) geometrically frustrated antiferromagnetic complexes perovskite

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Observation of unusual Griffith’s phase behavior in quadruple perovskite oxide CaCu3Mn4O12 (CCMO) synthesized through chemical route

Cited by 15 publications

References 32 publications

Extremely enhanced thermal stability of Y2/3Cu3Ti4O12 ceramics by a Pechini method

Extremely enhanced thermal stability of Y2/3Cu3Ti4O12 ceramics by a Pechini method

Construction of Waste Chalk Powder into mpg-C3N4-CaSO4 as an Efficient Photocatalyst for Dye Degradation under UV–Vis Light and Sunlight

The emergence of Griffiths phase in CaCu3Ti(4−x)MnxO12 (CCTMO, x = 1, 2 and 3) geometrically frustrated antiferromagnetic complexes perovskite

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Extremely enhanced thermal stability of Y_2/3Cu₃Ti₄O₁₂ ceramics by a Pechini method

Extremely enhanced thermal stability of Y_2/3Cu₃Ti₄O₁₂ ceramics by a Pechini method

Construction of Waste Chalk Powder into mpg-C₃N₄-CaSO₄ as an Efficient Photocatalyst for Dye Degradation under UV–Vis Light and Sunlight