Improvement of room-temperature TCR and MR in polycrystalline La0.67(Ca0.27Sr0.06)MnO3 ceramics by Ag2O doping

Sun, Tao; Jiang, Jun; Chen, Qingming; Liu, Xiang

doi:10.1016/j.ceramint.2018.02.234

Cited by 45 publications

(4 citation statements)

References 40 publications

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“…It was easier for a portion of the PI phase to transition to the FM phase, which could cause an increase in resistivity, thus enhancing the effect of the CMR. 28 This behavior was observed in other literature reports and was consistent with the magnetic transitions that were common in magnetization measurements, thus suggesting that the f involved here had a similar physical signicance as magnetization decreased.…”

Section: Rsc Advances Papersupporting

confidence: 91%

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Improved electrical transport properties of polycrystalline La_0.8(Ca_0.12Sr_0.08)MnO₃ ceramics by Ag₂O doping

Dong

Sun

et al. 2019

RSC Adv.

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Section: Rsc Advances Papersupporting

confidence: 91%

“…The pellets were sintered at 1450 C under owing oxygen for 12 h in high-purity Al 2 O 3 crucibles. 27,28 The crystal structure of LCSMO:Ag x ceramics were characterized by X-ray powder diffraction (XRD, Ultima IV). A scanning electron microscope (SEM, SU8010) was used for analyzing the surface morphology and microstructures of the samples.…”

Section: Methodsmentioning

confidence: 99%

Improved electrical transport properties of polycrystalline La_0.8(Ca_0.12Sr_0.08)MnO₃ ceramics by Ag₂O doping

Dong

Sun

et al. 2019

RSC Adv.

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“…A feasible solution is to integrate radiative coolers with air conditioning system, which can actively control the access or disconnection of RC modules, at the cost of high energy consumption. Another feasible solution is to use dynamic radiative coolers, which can be realized in many methods, for example, electrically tunable materials (semiconductor quantum wells [74,75], graphene [76]), thermal tunable materials (SiN x ) [77] and phase-changing materials (Ge 2 Sb 2 Te 5 [78,79], VO 2 [80,81], La 0.7 Ca 0.3-x Sr x MnO 3 [82,83]). Electrically tunable materials and thermal tunable materials require not only additional energy input to convert dynamic radiation intensity but also complex structure and high preparation cost.…”

Section: Controllable Cooling Powermentioning

confidence: 99%

Advances and challenges in commercializing radiative cooling

Liu

Zhou

et al. 2019

Materials Today Physics

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Radiative cooling (RC) dissipates terrestrial heat to outer space through the atmospheric window, without external energy input and production of environmental pollutants. More and more efforts have been devoted to this clean promising cooling technology; thus diverse radiative coolers have emerged. However, the performance, cost, and effectiveness of various radiative coolers are not exactly the same. In addition, the large-scale application of RC technology is impeded by the low energy density, uncontrollable cooling power, and limited sky-facing area. Here, we critically review the recent progress of RC technology, evaluate the cooling performance of various radiative coolers, and discuss the challenges and feasible solutions to commercialize RC technology. Furthermore, valuable insights are provided to make new breakthroughs in this field.

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“…Composites of LaMnO3 and many non-magnetic insulating oxides have been investigated to improve low-field magneto transport properties [15], but La0.7Sr0.2Ca0.1MnO3 (LSCMO)-TiO2 composites have not been studied. Moreover, no systematic efforts have been made to investigate the structural properties and minimum cryogenic resistance of these composites.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Magnetic and Electrical Transport Properties of Sol-Gel Synthesized La0.7Sr0.2Ca0.1MnO3:TiO2 Composite

Zulkarnain

Kurniawan

Imaduddin³

et al. 2023

SSP

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Electrical transport in materials have been studied extensively due to its great potential in spintronic technology. The introduction of the secondary phase into the manganite matrix can modify the electrical properties, subsequently improving the low-field magnetic resistance (LFMR). In this work, we study the change in electrical properties at different temperatures of polycrystalline (1-x)La0.7Sr0.2Ca0.1MnO3/xTiO2 (LT) composites where x = 0, 0.05 and 0.1. Polycrystalline La0.7Sr0.2Ca0.1MnO3 (LSCMO) was synthesized by sol-gel method, calcined at 700 °C, and pre-sintered at 800 °C for 6 h before adding TiO2. TiO2 as filler was mixed with LSCMO by wet mixing and stirring for about 30 min until a homogeneous compound was formed. Composite LT was then inserted to oven up to 100 °C for 2h to remove the moisture, compacted at 10 MPa, and sintered at 1200°C for 12 h. All samples in the LSCMO phase have a rhombohedral crystal structure with space group R3c. The crystal structure parameters were studied using Rietveld refinement through GSAS II software. The sample was characterized by SEM to represent the morphology of the sample. As the TiO2 content increased, the magnetization decreased, as observed by VSM analysis at room temperature. The electrical transport properties of pure LSCMO and LT were characterized by cryogenic from 195K to 260 K. The resistivity of LT10 is too high compared to that of LT5 and as the temperature increases, the resistivity in this range will decrease. For 200 K, the resistivity of LSCMO, LT5 and LT10 are 3.09 x 10-2 ohm.cm, 4.40 x 103 ohm.cm and 4.77 x 104 ohm.cm respectively.

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Improvement of room-temperature TCR and MR in polycrystalline La0.67(Ca0.27Sr0.06)MnO3 ceramics by Ag2O doping

Cited by 45 publications

References 40 publications

Improved electrical transport properties of polycrystalline La_0.8(Ca_0.12Sr_0.08)MnO₃ ceramics by Ag₂O doping

Improved electrical transport properties of polycrystalline La_0.8(Ca_0.12Sr_0.08)MnO₃ ceramics by Ag₂O doping

Advances and challenges in commercializing radiative cooling

Microstructure, Magnetic and Electrical Transport Properties of Sol-Gel Synthesized La<sub>0.7</sub>Sr<sub>0.2</sub>Ca<sub>0.1</sub>MnO<sub>3</sub>:TiO<sub>2</sub> Composite

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Improvement of room-temperature TCR and MR in polycrystalline La0.67(Ca0.27Sr0.06)MnO3 ceramics by Ag2O doping

Cited by 45 publications

References 40 publications

Improved electrical transport properties of polycrystalline La0.8(Ca0.12Sr0.08)MnO3 ceramics by Ag2O doping

Improved electrical transport properties of polycrystalline La0.8(Ca0.12Sr0.08)MnO3 ceramics by Ag2O doping

Advances and challenges in commercializing radiative cooling

Microstructure, Magnetic and Electrical Transport Properties of Sol-Gel Synthesized La<sub>0.7</sub>Sr<sub>0.2</sub>Ca<sub>0.1</sub>MnO<sub>3</sub>:TiO<sub>2</sub> Composite

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Improved electrical transport properties of polycrystalline La_0.8(Ca_0.12Sr_0.08)MnO₃ ceramics by Ag₂O doping

Improved electrical transport properties of polycrystalline La_0.8(Ca_0.12Sr_0.08)MnO₃ ceramics by Ag₂O doping