Synthesis of manganite perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3} nanoparticles in w/o-microemulsion

doi:10.1016/j.materresbull.2005.08.015

Title: Synthesis of manganite perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3} nanoparticles in w/o-microemulsion

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Abstract

In this paper, w/o-microemulsions were employed to produce nanoparticles of the perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3}, which have a size of approximately 20-50 nm. The procedure was carried out using sodium hydroxide or ammonia as co-precipitation agent. The precursor was transformed to perovskite by calcinations at 580 deg. C. Nanosized particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and N{sub 2} adsorption (BET)

Authors:

Lopez-Trosell, Alejandra ^[1]; Schomaecker, Reinhard ^[2]

Department of Chemistry, TU Berlin, Sekr. TC 8, Strasse des 17. Juni 124, 10623 Berlin (Germany). E-mail: Lopez.Alejandra@chem.tu-berlin.de
Department of Chemistry, TU Berlin, Sekr. TC 8, Strasse des 17. Juni 124, 10623 Berlin (Germany). E-mail: schomaecker@tu-berlin.de

Publication Date:: Thu Feb 02 00:00:00 EST 2006

OSTI Identifier:: 20891623

Resource Type:: Journal Article

Resource Relation:: Journal Name: Materials Research Bulletin; Journal Volume: 41; Journal Issue: 2; Other Information: DOI: 10.1016/j.materresbull.2005.08.015; PII: S0025-5408(05)00317-X; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; ADSORPTION; AMMONIA; CALCINATION; CALCIUM OXIDES; CHEMICAL PREPARATION; COPRECIPITATION; MANGANESE OXIDES; MICROEMULSIONS; NANOSTRUCTURES; PEROVSKITE; PRECURSOR; SCANNING ELECTRON MICROSCOPY; SODIUM HYDROXIDES; STRONTIUM OXIDES; X-RAY DIFFRACTION

Citation Formats


                    Lopez-Trosell, Alejandra, and Schomaecker, Reinhard. Synthesis of manganite perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3} nanoparticles in w/o-microemulsion.  United States: N. p., 2006. 
        Web.  doi:10.1016/j.materresbull.2005.08.015.

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                    Lopez-Trosell, Alejandra, & Schomaecker, Reinhard. Synthesis of manganite perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3} nanoparticles in w/o-microemulsion.  United States.  doi:10.1016/j.materresbull.2005.08.015.

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                    Lopez-Trosell, Alejandra, and Schomaecker, Reinhard. Thu .  
        "Synthesis of manganite perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3} nanoparticles in w/o-microemulsion".  United States.  
        doi:10.1016/j.materresbull.2005.08.015.

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@article{osti_20891623,

  title        = {Synthesis of manganite perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3} nanoparticles in w/o-microemulsion},

  author       = {Lopez-Trosell, Alejandra and Schomaecker, Reinhard},

  abstractNote = {In this paper, w/o-microemulsions were employed to produce nanoparticles of the perovskite Ca{sub 0.5}Sr{sub 0.5}MnO{sub 3}, which have a size of approximately 20-50 nm. The procedure was carried out using sodium hydroxide or ammonia as co-precipitation agent. The precursor was transformed to perovskite by calcinations at 580 deg. C. Nanosized particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and N{sub 2} adsorption (BET)},

  doi          = {10.1016/j.materresbull.2005.08.015},

  journal      = {Materials Research Bulletin},

  number       = 2,

  volume       = 41,

  place        = {United States},

  year         = {Thu Feb 02 00:00:00 EST 2006},

  month        = {Thu Feb 02 00:00:00 EST 2006}

}

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Journal Article:

DOI: 10.1016/j.materresbull.2005.08.015

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Hydrothermal synthesis of the perovskite manganites Pr{sub 0.5}Sr{sub 0.5}MnO{sub 3} and Nd{sub 0.5}Sr{sub 0.5}MnO{sub 3} and alkali-earth manganese oxides CaMn{sub 2}O{sub 4}, 4H-SrMnO{sub 3}, and 2H-BaMnO{sub 3}

Spooren, Jeroen ; Walton, Richard I. - Journal of Solid State Chemistry

We report the synthesis of the perovskite manganites Pr{sub 0.5}Sr{sub 0.5}MnO{sub 3} and Nd{sub 0.5}Sr{sub 0.5}MnO{sub 3} using mild hydrothermal conditions. Both are formed as polycrystalline powders from solutions of metal salts in aqueous potassium hydroxide at 240 deg. C, and crystallise as a tetragonal polymorph (space group I4/mcm). Scanning electron microscopy shows both materials to contain cuboid-shaped crystallites several microns in dimension, and the average particle size is verified by light scattering measurements. We also report the first hydrothermal synthesis of 2H-BaMnO{sub 3} and 4H-SrMnO{sub 3}, and the first subcritical hydrothermal synthesis of CaMn{sub 2}O{sub 4} (marokite). Despite themore »« less
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Neutron diffraction study of phase separation in the Pr{sub 0.5-{delta}}Ca{sub 0.2+{delta}}Sr{sub 0.3}MnO{sub 3} manganite around half doping

Aurelio, G. ; Niebieskikwiat, D. ; Sanchez, R.D. ; ... - Physical Review. B, Condensed Matter and Materials Physics

This article studies the intrinsic influence of hole doping (n=0.5+{delta}) on the structural and magnetic phases of the Pr{sub 0.5-{delta}}Ca{sub 0.2+{delta}}Sr{sub 0.3}MnO{sub 3} ceramic manganite. Neutron thermodiffractograms are reported for samples with n=0.46, 0.48, 0.50, 0.52, and 0.54 ({delta}=-0.04,-0.02,0.0,0.02,0.04) in the temperature range 10 K{<=}T{<=}300 K, as well as high-resolution neutron-diffraction experiments for selected samples and temperatures. We observe structural and magnetic phase coexistence for all the studied compositions and discuss the temperature evolution of the lattice parameters, phase fractions, and magnetic moments of the observed phases. For hole dopings n<(1/2), the ground state at low temperature is ferromagnetic, whilemore »« less
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Magnetic relaxation behavior in La{sub 0.5}Ca{sub 0.5}MnO{sub 3} and Nd{sub 0.5}Sr{sub 0.5}MnO{sub 3}

Lopez, J. ; Lisboa-Filho, P. N. ; Passos, W. A. C. ; ... - Physical Review B

We have carried out a systematic magnetic relaxation study, measured after applying and switching off a 5 T magnetic field to polycrystalline samples of La{sub 0.5}Ca{sub 0.5}MnO{sub 3} and Nd{sub 0.5}Sr{sub 0.5}MnO{sub 3}. The long time logarithmic relaxation rate (LTLRR), decreased from 10 to 150 K and increased from 150 to 195 K in La{sub 0.5}Ca{sub 0.5}MnO{sub 3}. This change in behavior was found to be related to the complete suppression of the antiferromagnetic phase above 150 K and in the presence of a 5 T magnetic field. At 195 K, the magnetization first decreased, and after a few minutesmore »« less
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Orbital Ordering Structures in (Nd,Pr){0.5}Sr{0.5}MnO{3} Manganite Thin Films on Perovskite (011) Substrates

Wakabayashi,Y. ; Bizen, D. ; Kubo, Y. ; ... - Journal of the Physical Society of Japan

Structural study of orbital-ordered manganite thin films has been conducted using synchrotron radiation, and a ground state electronic phase diagram is made. The lattice parameters of four manganite thin films, Nd0.5Sr0.5MnO3 (NSMO) or Pr0.5Sr0.5MnO3 (PSMO) on (011) surfaces of SrTiO3 (STO) or [(LaAlO3)0.3(SrAl0.5Ta0.5O3)0.7] (LSAT), were measured as a function of temperature. The result shows, as expected based on previous knowledge of bulk materials, that the films' resistivity is closely related to their structures. Observed superlattice reflections indicate that NSMO thin films have an antiferro-orbital-ordered phase as their low-temperature phase while PSMO film on LSAT has a ferro-orbital-ordered phase, and thatmore »« less
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Synthesis crystal structure and ionic conductivity of Ca{sub 0.5}Bi{sub 3}V{sub 2}O{sub 10} and Sr{sub 0.5}Bi{sub 3}V{sub 2}O{sub 10}

Porob, Digamber G. ; Guru Row, T.N. - Journal of Solid State Chemistry

Two new compounds Ca{sub 0.5}Bi{sub 3}V{sub 2}O{sub 10} and Sr{sub 0.5}Bi{sub 3}V{sub 2}O{sub 10} have been synthesized in the ternary system: MO-Bi{sub 2}O{sub 3}-V{sub 2}O{sub 5} system (M=M{sup 2+}). The crystal structure of Sr{sub 0.5}Bi{sub 3}V{sub 2}O{sub 10} has been determined from single crystal X-ray diffraction data, space group P1-bar and Z=2, with cell parameters a=7.1453(3)A, b=7.8921(3)A, c=9.3297(3)A, {alpha}=106.444(2){sup o}, {beta}=94.088(2){sup o}, {gamma}=112.445(2){sup o}, V=456.72(4)A{sup 3}. Ca{sub 0.5}Bi{sub 3}V{sub 2}O{sub 10} is isostructural with Sr{sub 0.5}Bi{sub 3}V{sub 2}O{sub 10}, with, a=7.0810(2)A, b=7.8447(2)A, c=9.3607(2)A, {alpha}=106.202(1){sup o}, {beta}=94.572(1){sup o}, {gamma}=112.659(1){sup o}, V=450.38(2)A{sup 3} and its structure has been refined by Rietveld methodmore »« less
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