Influence of molar ratio of citric acid to metal ions on preparation of La0.67Sr0.33MnO3 materials via polymerizable complex process

Yang, Wein-Duo; Chang, Y. H.; Huang, S. S.

doi:10.1016/j.jeurceramsoc.2004.09.028

Cited by 77 publications

(26 citation statements)

References 23 publications

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“…3, the absorption peaks around 1650 cm −1 and 2350 cm −1 are of the carrier KBr (H 2 O) n and CO 2 , respectively [23]. In S1, S2, and S3 samples, the strong absorbing peaks at 860 cm −1 and 1450 cm −1 are belong to SrCO 3 [23,24]. Annealing the samples at 550°C and 600°C will decrease the above peaks; this is the indication of decomposition of SrCO 3 at 550°C.…”

Section: Resultsmentioning

confidence: 96%

Magnetic Properties of Interacting La0.67Sr0.33MnO3 Nanoparticles

Rostamnejadi

Salamati

Kameli

2011

J Supercond Nov Magn

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Magnetic nanoparticles of La 0.67 Sr 0.33 MnO 3 (LSMO) with mean particle sizes of 13, 16, 18, and 21 nm were prepared by the sol-gel method. The samples were characterized by X-ray diffraction (XRD) using Rietveld refinement and transmission electron microscope (TEM). Fourier transform infrared (FTIR) transmission spectroscopy revealed that stretching and bending modes are influenced by annealing temperature. Dc magnetization versus magnetic field of the samples was carried out at room temperature. Magnetic dynamics of the samples was studied by the measurement of ac magnetic susceptibility versus temperature at different frequencies and ac magnetic fields. A frequency-dependent peak was observed in ac magnetic susceptibility versus temperature which is well described by Vogel-Fulcher and critical slowing down laws, and empirical c 1 = T f T f (log 10 f ) and c 2 = T f −T 0 T f parameters. By fitting the experimental data with Vogel-Fulcher magnetic anisotropy energy and an effective magnetic anisotropy constant have been estimated. The obtained values support the presence of strong interaction between magnetic nanoparticles of LSMO.

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Section: Resultsmentioning

confidence: 96%

Magnetic Properties of Interacting La0.67Sr0.33MnO3 Nanoparticles

Rostamnejadi

Salamati

Kameli

2011

J Supercond Nov Magn

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“…There are several routes to synthesize perovskite structured materials. These routes include the polymeric precursor route or the Pechini method [21][22][23] , which stands out for its enhanced stoichiometric control, allowing for doping in a ppm order of magnitude, with good composition homogeneity, depending on the system's composition. This method also allows one to obtain relatively high specific surface area powders when compared with other traditional solid state reaction methods [24][25][26] .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of La1-xSr xMnO3±δ powders obtained by the polymeric precursor route

et al. 2011

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Polycrystalline strontium-doped lanthanum manganite (LSM) powders with 0.15, 0.22, and 0.30 mol % Sr were synthesized by the polymeric precursor route using a molar ratio of 3:1 citric acid and metal cations. The powders were characterized by Fourier transform infrared spectroscopy, thermal analysis, high-temperature X-ray diffraction to determine the crystalline perovskite phase and crystallite sizes, scanning electron microscopy for the morphological analysis, nitrogen adsorption to determine the specific surface area, and laser scattering to evaluate the particle size distribution. The LSM perovskite-type oxides containing intermediate 0.22 mol % Sr were found to exhibit a tendency to decrease in crystallite size and increase in specific surface area and, when calcined at 700-900 °C exhibited a pure phase of perovskite, had a crystallite size of about 17-20 nm and a specific surface area for 900 °C of 34.3 m 2 .g -1.

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“…It indicates that the reaction is incomplete without CTAB surfactant. Indeed, the highly crystallized nanowires (rods) shown in the picture have been identified by selected area diffraction (SAD) and energy dispersive X-ray (EDX) to be La(OH) 3 . Figure 3b and c reveals the formation of LSMO particles.…”

Section: Resultsmentioning

confidence: 99%

“…Manganites also exhibit a variety of phases, with unusual spin, charge, lattice, and orbital order [1]. A large number of experiments on polycrystals [3], single crystals [4] and thin films [5] have been carried out to study the physics involved and to explore possible applications of CMR effect.…”

Section: Introductionmentioning

confidence: 99%

Surfactant Effect on Synthesis of Nanocrystalline La_xSr_1-xMnO₃by Hydrothermal Method

Sin

Wong

2007

Acta Phys. Pol. A

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Crystalline LaxSr1−xMnO3 was prepared by a hydrothermal route in the presence of surfactant. The cationic surfactant of cetyltrimethylammonium bromide as a template is used to regulate the nucleation and crystal growth. The as-synthesized product was characterized by X-ray diffraction and transmission electron microscopy. Nanosized and uniform rod-like monocrystals of LaxSr1−xMnO3 were obtained. Their magnetic properties were studied using a vibrating sample magnetometer. Our results reveal that the use of surfactant helps to lower the processing temperature and to speed up the formation and crystallization of La x Sr 1−x MnO 3 . The surfactant also provides us an additional means of controlling the nanocrystalline size and maintaining the stoichiometry of the as-prepared nanocrystallites.

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Influence of molar ratio of citric acid to metal ions on preparation of La0.67Sr0.33MnO3 materials via polymerizable complex process

Cited by 77 publications

References 23 publications

Magnetic Properties of Interacting La0.67Sr0.33MnO3 Nanoparticles

Magnetic Properties of Interacting La0.67Sr0.33MnO3 Nanoparticles

Synthesis and characterization of La1-xSr xMnO3±δ powders obtained by the polymeric precursor route

Surfactant Effect on Synthesis of Nanocrystalline La_xSr_1-xMnO₃by Hydrothermal Method

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Influence of molar ratio of citric acid to metal ions on preparation of La0.67Sr0.33MnO3 materials via polymerizable complex process

Cited by 77 publications

References 23 publications

Magnetic Properties of Interacting La0.67Sr0.33MnO3 Nanoparticles

Magnetic Properties of Interacting La0.67Sr0.33MnO3 Nanoparticles

Synthesis and characterization of La1-xSr xMnO3±δ powders obtained by the polymeric precursor route

Surfactant Effect on Synthesis of Nanocrystalline LaxSr1-xMnO3by Hydrothermal Method

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Surfactant Effect on Synthesis of Nanocrystalline La_xSr_1-xMnO₃by Hydrothermal Method