Synthesis, Structural Characterization and Thermal Stability of Nanocrystalline Rare-Earth Chromates (RECrO&lt;SUB&gt;4&lt;/SUB&gt;) and Rare-Earth Chromites (RECrO&lt;SUB&gt;3&lt;/SUB&gt;)

Thakur, Jyotsna; Shukla, Rakesh; Raje, Naina; Ghonge, D.; Bagla, Hemlata; Tyagi, A. K.

doi:10.1166/nnl.2011.1233

Cited by 6 publications

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“…22 The other method to reduce the sintering temperature is mechanosynthesis. 23 What is more, many other preparation strategies, such as combustion, 24,25 microwave, 26 co-precipitation, 27 hydrothermal synthesis, 7,28,29 spray pyrolysis, 30 hydrazine method, 31 citric acid/citrate 32,33 or glycine 34,35 gel route, polyol mediated synthesis, 36 decomposition of molecular precursors 37 and so on, have been effectively engaged in the synthesis of rare earth orthochromites.…”

Section: Introductionmentioning

confidence: 99%

General synthesis of rare-earth orthochromites with quasi-hollow nanostructures and their magnetic properties

et al. 2013

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Rare-earth orthochromites are extremely interesting because of their potential applications as multifunctional materials. However, it is still a great challenge for the general synthesis of nanostructured full rare-earth orthochromites series. Here, a facile and versatile solvothermal reduction strategy is successfully employed in the preparation of rare-earth chromites with quasi-hollow nanostructures. X-ray diffraction data show that all the products have the orthorhombic perovskite structure. The electron microscopy analysis reveals that the morphology of the product is seriously affected by the rare-earth ionic radius. Tube-like and vesicle-like structures can be formed for the larger and smaller rare-earth cationic radii, respectively. The experimental results suggest that the roomtemperature precursors of potassium rare-earth chromates serve as a self-template for the in situ reduction and formation of rare-earth orthochromites hollow structures. The magnetization studies demonstrate that all the products, as it would be expected, undergo a magnetic transition from paramagnetic to antiferromagnetic phase at the Néel temperature (T N1 ) attributed to Cr 3+ -Cr 3+ exchange and this critical temperature goes up linearly with an increase in the rare-earth ionic radius.Additionally, some samples exhibit a variety of fancy magnetic properties, including thermal hysteresis suggesting a first-order magnetic transition, magnetization reversal due to the antiparallel polarization of the R 3+ paramagnetic moments by the Cr 3+ canted antiferromagnetic ones, and magnetic exchange bias related to the spin reorientation transition of the Cr 3+ magnetic moments. † Electronic supplementary information (ESI) available: XRD patterns and SEM images of the typical room-temperature intermediates; TEM images of the typical 1200 C annealing sample; SEM images of LaCrO 3 , PrCrO 3 , NdCrO 3 and SmCrO 3 before and aer annealing; summary of the magnetic data based on the temperature dependence of the magnetization for all samples. See

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Section: Introductionmentioning

confidence: 99%

General synthesis of rare-earth orthochromites with quasi-hollow nanostructures and their magnetic properties

et al. 2013

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“…Optical switches and sensors based on magneto-optical properties were made with these materials [16,17]. Fabrication of rare-earth chromates and many other ternary oxide compounds involves various synthesis methods [8,[18][19][20][21][22][23][24][25]. Recently, we have reported YCrO 3 nanoparticles for its enhanced multiferroic properties using polymeric citrate precursor route [26].…”

Section: Introductionmentioning

confidence: 99%

Structural characterization and properties of $$\hbox {YCrO}_{3}$$ YCrO 3 nanoparticles prepared by reverse micellar method

Ahmad

Lone

2018

Bull Mater Sci

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YCrO 3 nanoparticles were prepared by reverse micellar method by the use of surfactant tergitol after heating the precursor sample at 800 • C. As-prepared YCrO 3 nanoparticles were characterized by various sophisticated techniques like X-ray diffraction (XRD), transmission electron microscope, Brunauer-Emmett-Teller surface area analyzer, high frequency LCR-meter, superconducting quantum interface device magnetometer and P-E loop tracer. Powder XRD study reveals the formation of highly crystalline orthorhombic monophasic YCrO 3 nanoparticles. The average grain size of as-prepared nanoparticles was found to be 35 nm with the surface area of 348 m 2 g −1. Wedge-shaped hysteresis for ferromagnetism and the room temperature ferroelectricity confirm the multiferroic characteristics in the nanoparticles.

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Synthesis of Materials with Unusual Oxidation State

Achary

Tyagi

2021

Handbook on Synthesis Strategies for Advanced Materials

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Synthesis, Structural Characterization and Thermal Stability of Nanocrystalline Rare-Earth Chromates (RECrO<SUB>4</SUB>) and Rare-Earth Chromites (RECrO<SUB>3</SUB>)

Cited by 6 publications

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General synthesis of rare-earth orthochromites with quasi-hollow nanostructures and their magnetic properties

General synthesis of rare-earth orthochromites with quasi-hollow nanostructures and their magnetic properties

Structural characterization and properties of $$\hbox {YCrO}_{3}$$ YCrO 3 nanoparticles prepared by reverse micellar method

Synthesis of Materials with Unusual Oxidation State

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