Remarkable enhancement of La(1-x)SmxCrO3 nanoperovskite properties: An influence of its doping concentrations

Sivaprakash, P.; Ananth, Antony; Nagarajan, V.; Arumugam, S.

doi:10.1016/j.materresbull.2017.07.017

Cited by 19 publications

(3 citation statements)

References 28 publications

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“…The relative percentage difference in ionic radii of the respective alkali metal ions is found to be K = 79.59%Li, K = 32.20%Na and Na = 50.63%Li, neglecting the role of anthracene. This relative change in the ionic radii of the respective metal ions (K + >Na + >Li + ) occupies large crystal lattice and may favours the crystallinity with subsequent growth along (–2 0 2) plane . The presence of the alkali impurities also alters the external morphology (as shown in Figure ) without changing the monoclinic crystal structure which was found to be in agreement with our previously reported work …”

Section: Resultssupporting

confidence: 91%

Remarkable Enhancement on Optical Properties of Alkali Metals Doped Anthracene Crystals

Nagarajan¹,

Ananth

Ramaswamy³

2017

Crystal Research and Technology

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Alkali metals (Li, Na, K) doped anthracene high quality organic crystals were grown by slow evaporation at ambient environment. The relative occupancy of dopants and its influence of AN lattice phonons has been probed using elemental and diffraction analysis respectively. These alkali metal ions act as an efficient optically active sites, thereby projecting enhancement in UV region and photoluminescence studies. The nonlinear susceptibility (χ(3)) have been evaluated for doped crystals from Z ‐ scan technique and the values of these parameters found to be 10−2 esu which was higher than reported organic crystals. The incorporation of the alkali metal ions progressively alters melting point, overtone vibrational bands, mechanical strength and nonlinear optical properties for the grown crystals. The improved thermal, mechanical, linear and nonlinear optical properties of doped crystals make it as a better candidate for optoelectronic applications.

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Section: Resultssupporting

confidence: 91%

Remarkable Enhancement on Optical Properties of Alkali Metals Doped Anthracene Crystals

Nagarajan¹,

Ananth

Ramaswamy³

2017

Crystal Research and Technology

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“…The anti-symmetric exchange interaction arises from the interaction of low spin Co (III) with the excited high spin Co (III). This further influences magnetocrystallite anisotropy and reduces the coercive field [ 52 , 53 , 54 , 55 ]. In our previous study of Mn-doped LCO, the RT M-H shows only a paramagnetic state even after incorporation with Mn at the Co site [ 19 ].…”

Section: Resultsmentioning

confidence: 99%

Influence of Te-Incorporated LaCoO3 on Structural, Morphology and Magnetic Properties for Multifunctional Device Applications

Sahadevan

Sivaprakash

Muthu

et al. 2023

IJMS

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A high perovskite activity is sought for use in magnetic applications. In this paper, we present the simple synthesis of (2.5% and 5%) Tellurium-impregnated-LaCoO3 (Te-LCO), Te and LaCoO3 (LCO) by using a ball mill, chemical reduction, and hydrothermal synthesis, respectively. We also explored the structure stability along with the magnetic properties of Te-LCO. Te has a rhombohedral crystal structure, whereas Te-LCO has a hexagonal crystal system. The reconstructed Te was imbued with LCO that was produced by hydrothermal synthesis; as the concentration of the imbuing agent grew, the material became magnetically preferred. According to the X-ray photoelectron spectra, the oxidation state of the cobaltite is one that is magnetically advantageous. As a result of the fact that the creation of oxygen-deficient perovskites has been shown to influence the mixed (Te4+/2−) valence state of the incorporated samples, it is abundantly obvious that this process is of utmost significance. The TEM image confirms the inclusion of Te in LCO. The samples start out in a paramagnetic state (LCO), but when Te is added to the mixture, the magnetic state shifts to a weak ferromagnetic one. It is at this point that hysteresis occurs due to the presence of Te. Despite being doped with Mn in our prior study, rhombohedral LCO retains its paramagnetic characteristic at room temperature (RT). As a result, the purpose of this study was to determine the impacts of RT field dependency of magnetization (M-H) for Te-impregnated LCO in order to improve the magnetic properties of RT because it is a low-cost material for advanced multi-functional and energy applications.

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“…In this present work, for the first time the shock-influenced nickel fluoride (NiF2) used as an electrode material to design and construct a unique asymmetric supercapacitor which is a novel approach to observe its switchable changes over different shocked conditions. Also, the presence of Ni ions in NiF2 material offer high electronic/ionic conductivity, good redox reactions and stability [13][14][15]. Further, the formation of nickel oxyfluoride causes the Ni metal ions to appear in many oxidation states, which enhances the electrochemical behaviour in terms of the high voltage window [4,7,16].…”

Section: Introductionmentioning

confidence: 99%

Investigation of energy storage applications on nickel fluoride nanomaterials under shock wave flow environments

Arumugam

2023

MNIJ

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In this research article, we have conducted the comparative studies on ambient and 200 shock loaded NiF2 sample using a table top pressure-driven shock tube (Reddy Tube) for supercapacitor application. The stability of structural, morphological and electrochemical properties of the shock loaded and unloaded were tested and analysed. The shock wave of 2.2 Mach number with transient pressure of 2.0 MPa with 864 K temperature was made to strike on two test samples (ambient and 200). The molecular and crystallite structure stabilities of the test samples were examined by XRD and FTIR. The surface morphology was investigated by FESEM and electrochemical measurements such as Cyclic Voltammetry (CV), Galvanostatic Charge-Discharge (GCD) techniques were performed to investigate the super capacitive behaviour of NiF2 sample for loaded and unloaded conditions. The obtained results revealed changes in crystallite size and particle size and it still maintains its phase stability of rutile NiF2 after 200 shocked conditions. Further, the electrochemical measurements exhibit higher capacitance of 1770.5 F/g for 200 shock loaded condition which is very high range when compared with ambient condition. Furthermore, it measured high energy density (88.52 Wh/kg) and power density (1499.8 W/kg) at 2 A/g current density which is very higher compared to others. Hence under high shocked conditions, the electrochemical properties were enhanced due to shock wave impacts on the NiF2 material.

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Remarkable enhancement of La(1-x)SmxCrO3 nanoperovskite properties: An influence of its doping concentrations

Cited by 19 publications

References 28 publications

Remarkable Enhancement on Optical Properties of Alkali Metals Doped Anthracene Crystals

Remarkable Enhancement on Optical Properties of Alkali Metals Doped Anthracene Crystals

Influence of Te-Incorporated LaCoO3 on Structural, Morphology and Magnetic Properties for Multifunctional Device Applications

Investigation of energy storage applications on nickel fluoride nanomaterials under shock wave flow environments

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