Influence of surface and finite size effects on the structural and magnetic properties of nanocrystalline lanthanum strontium perovskite manganites

Žvátora, Pavel; Veverka, Miroslav; Veverka, Pavel; Knížek, Karel; Závěta, Karel; Pollert, Emil; Král, Vladimír; Goglio, Graziella; Duguet, Etienne; Kaman, Ondřej

doi:10.1016/J.JSSC.2013.06.006

Title: Influence of surface and finite size effects on the structural and magnetic properties of nanocrystalline lanthanum strontium perovskite manganites

Full Record
Other Related Research

Abstract

Syntheses of nanocrystalline perovskite phases of the general formula La{sub 1−x}Sr{sub x}MnO{sub 3+δ} were carried out employing sol–gel technique followed by thermal treatment at 700–900 °C under oxygen flow. The prepared samples exhibit a rhombohedral structure with space group R3{sup ¯}c in the whole investigated range of composition 0.20≤x≤0.45. The studies were aimed at the chemical composition including oxygen stoichiometry and extrinsic properties, i.e. size of the particles, both influencing the resulting structural and magnetic properties. The oxygen stoichiometry was determined by chemical analysis revealing oxygen excess in most of the studied phases. The excess was particularly high for the samples with the smallest crystallites (12–28 nm) while comparative bulk materials showed moderate non-stoichiometry. These differences are tentatively attributed to the surface effects in view of the volume fraction occupied by the upper layer whose atomic composition does not comply with the ideal bulk stoichiometry. - Graphical abstract: Evolution of the particle size with annealing temperature in the nanocrystalline La{sub 0.70}Sr{sub 0.30}MnO{sub 3+δ} phase. Display Omitted - Highlights: • The magnetic behaviour of nanocrystalline La{sub 1−x}Sr{sub x}MnO{sub 3+δ} phases was analyzed on the basis of their crystal structure, chemical composition and size of the particles. • Their Curie temperature andmore »« less

Authors:

Žvátora, Pavel ^[1]; Veverka, Miroslav; Veverka, Pavel; Knížek, Karel; Závěta, Karel; Pollert, Emil ^[2]; Král, Vladimír ^[1]; Goglio, Graziella; Duguet, Etienne ^[3]; Kaman, Ondřej ^[2]

Department of Analytical Chemistry, Institute of Chemical Technology Prague, Technická 5, 166 28 Prague (Czech Republic)
Department of Magnetism and Superconductors, Institute of Physics AS CR, Cukrovarnická 10/112, 162 00 Prague (Czech Republic)
CNRS, University of Bordeaux, ICMCB, UPR 9048, 33600 Pessac (France)

Publication Date:: Thu Aug 15 00:00:00 EDT 2013

OSTI Identifier:: 22274061

Resource Type:: Journal Article

Journal Name:: Journal of Solid State Chemistry

Additional Journal Information:: Journal Volume: 204; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; ANNEALING; CHEMICAL ANALYSIS; CHEMICAL COMPOSITION; CRYSTALS; CURIE POINT; LANTHANUM; LAYERS; MAGNETIC PROPERTIES; MAGNETIZATION; MANGANESE; NANOSTRUCTURES; OXYGEN; PARTICLE SIZE; PEROVSKITE; SPACE GROUPS; STRONTIUM; SYNTHESIS; TRIGONAL LATTICES

Citation Formats


                    Žvátora, Pavel, Veverka, Miroslav, Veverka, Pavel, Knížek, Karel, Závěta, Karel, Pollert, Emil, Král, Vladimír, Zentiva Development, Goglio, Graziella, Duguet, Etienne, Kaman, Ondřej, and Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, 128 40 Prague. Influence of surface and finite size effects on the structural and magnetic properties of nanocrystalline lanthanum strontium perovskite manganites.  United States: N. p., 2013. 
        Web.  doi:10.1016/J.JSSC.2013.06.006.

Copy to clipboard


                    Žvátora, Pavel, Veverka, Miroslav, Veverka, Pavel, Knížek, Karel, Závěta, Karel, Pollert, Emil, Král, Vladimír, Zentiva Development, Goglio, Graziella, Duguet, Etienne, Kaman, Ondřej, & Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, 128 40 Prague. Influence of surface and finite size effects on the structural and magnetic properties of nanocrystalline lanthanum strontium perovskite manganites.  United States.  https://doi.org/10.1016/J.JSSC.2013.06.006

Copy to clipboard


                    Žvátora, Pavel, Veverka, Miroslav, Veverka, Pavel, Knížek, Karel, Závěta, Karel, Pollert, Emil, Král, Vladimír, Zentiva Development, Goglio, Graziella, Duguet, Etienne, Kaman, Ondřej, and Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, 128 40 Prague. 2013.  
        "Influence of surface and finite size effects on the structural and magnetic properties of nanocrystalline lanthanum strontium perovskite manganites".  United States.  https://doi.org/10.1016/J.JSSC.2013.06.006.

Copy to clipboard


                    
@article{osti_22274061,

  title        = {Influence of surface and finite size effects on the structural and magnetic properties of nanocrystalline lanthanum strontium perovskite manganites},

  author       = {Žvátora, Pavel and Veverka, Miroslav and Veverka, Pavel and Knížek, Karel and Závěta, Karel and Pollert, Emil and Král, Vladimír and Zentiva Development and Goglio, Graziella and Duguet, Etienne and Kaman, Ondřej and Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, 128 40 Prague},

  abstractNote = {Syntheses of nanocrystalline perovskite phases of the general formula La{sub 1−x}Sr{sub x}MnO{sub 3+δ} were carried out employing sol–gel technique followed by thermal treatment at 700–900 °C under oxygen flow. The prepared samples exhibit a rhombohedral structure with space group R3{sup ¯}c in the whole investigated range of composition 0.20≤x≤0.45. The studies were aimed at the chemical composition including oxygen stoichiometry and extrinsic properties, i.e. size of the particles, both influencing the resulting structural and magnetic properties. The oxygen stoichiometry was determined by chemical analysis revealing oxygen excess in most of the studied phases. The excess was particularly high for the samples with the smallest crystallites (12–28 nm) while comparative bulk materials showed moderate non-stoichiometry. These differences are tentatively attributed to the surface effects in view of the volume fraction occupied by the upper layer whose atomic composition does not comply with the ideal bulk stoichiometry. - Graphical abstract: Evolution of the particle size with annealing temperature in the nanocrystalline La{sub 0.70}Sr{sub 0.30}MnO{sub 3+δ} phase. Display Omitted - Highlights: • The magnetic behaviour of nanocrystalline La{sub 1−x}Sr{sub x}MnO{sub 3+δ} phases was analyzed on the basis of their crystal structure, chemical composition and size of the particles. • Their Curie temperature and magnetization are markedly affected by finite size and surface effects. • The oxygen excess observed in the La{sub 1−x}Sr{sub x}MnO{sub 3+δ} nanoparticles might be generated by the surface layer with deviated oxygen stoichiometry.},

  doi          = {10.1016/J.JSSC.2013.06.006},

  url          = {https://www.osti.gov/biblio/22274061},
  journal      = {Journal of Solid State Chemistry},

  issn         = {0022-4596},

  number       = ,

  volume       = 204,

  place        = {United States},

  year         = {Thu Aug 15 00:00:00 EDT 2013},

  month        = {Thu Aug 15 00:00:00 EDT 2013}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1016/J.JSSC.2013.06.006

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Magnetic state of the structural separated anion-deficient La{sub 0.70}Sr{sub 0.30}MnO{sub 2.85} manganite

Journal Article Trukhanov, A; Vasiliev, A; Balagurov, A; ... - Journal of Experimental and Theoretical Physics

The results of neutron diffraction studies of the La{sub 0.70}Sr{sub 0.30}MnO{sub 2.85} compound and its behavior in an external magnetic field are stated. It is established that in the 4-300 K temperature range, two structural perovskite phases coexist in the sample, which differ in symmetry (groups R3-bar c and I4/mcm). The reason for the phase separation is the clustering of oxygen vacancies. The temperature (4-300 K) and field (0-140 kOe) dependences of the specific magnetic moment are measured. It is found that in zero external field, the magnetic state of La{sub 0.70}Sr{sub 0.30}MnO{sub 2.85} is a cluster spin glass, whichmore »« less
https://doi.org/10.1134/S1063776111130127
Effect of sintering time on structural, microstructural and chemical composition of Ni-doped lanthanum gallate perovskites

Journal Article Kilner, J. - Journal of Solid State Chemistry

This work reports the effect of two different sintering times, 6 and 48 h on the structural, microstructural, and chemical features of Ni-doped La{sub 0.90}Sr{sub 0.10}GaO{sub 3.00−δ}. Independently of the sintering time, La{sub 0.90}Sr{sub 0.10}Ga{sub 1−x}Ni{sub x}O{sub 3.00−δ} (where x=0.10, and 0.20 (mol)) presents a rhombohedral symmetry with a lattice volume that decreases when NiO dopant increases. Besides the perovskite, LaSrGa{sub 3.00}O{sub 7.00} (nominal composition) is present as second phase in all cases. When the samples are doped with NiO, the peaks of this second phase are shifted with respect to the peaks of the pure phase. These shifts suggestmore »« less
https://doi.org/10.1016/J.JSSC.2015.04.030
Synthesis and characteristic of nanocrystalline La{sub 0.7}Sr{sub 0.3}MnO{sub 3} manganites by solid state reaction route

Journal Article Astik, Nidhi; Jha, Prafulla; Patil, Swapnilkumar; ... - AIP Conference Proceedings

Nanocrystalline stoichiometric La{sub 0.7}Sr{sub 0.3}MnO{sub 3} (x=0.3) manganites have been synthesized through solid-state reaction by ball milling mechanical method at two different sintering temperatures 1250°C and 1350°C. The synthesized samples were characterized using X-ray diffraction (XRD) and found to have rhombohedral crystal structure (R-3c). The calcined samples exhibited a pure single phase perovskite, had a crystallite size of about 47-51 nm. The morphology of the prepared nanocrystalline manganites were recorded by the field emission gun-scanning electron microscope (FEG-SEM) and EDAX.
https://doi.org/10.1063/1.4946518
Magnetic and magnetocaloric properties of La{sub 0.6}Pr{sub 0.1}Sr{sub 0.3}Mn{sub 1−x}Fe{sub x}O{sub 3} (0≤x≤0.3) manganites

Journal Article Hlil, E.; Ellouze, M.; Elhalouani, F.; ... - Journal of Solid State Chemistry

The La{sub 0.6}Pr{sub 0.1}Sr{sub 0.3}Mn{sub 1−x}Fe{sub x}O{sub 3} (x=0, 0.1, 0.2 and 0.3) samples have been elaborated by the solid-state reaction method. X-ray powder diffraction shows that all the samples crystallize in a rhombohedric phase with R3{sup ¯}c space group. The variation of magnetization as a function of temperature and applied magnetic field was carried out. The samples for x=0 and 0.1 exhibit a FM–PM transition at the Curie temperature T{sub C}, however, for x=0.2 and 0.3 exhibit an AFM–PM one at the Neel temperature T{sub N}, when the temperature increases. A magneto-caloric effect has been calculated in terms ofmore »« less
https://doi.org/10.1016/J.JSSC.2014.04.004
Nanocrystalline Sm{sub 0.5}Sr{sub 0.5}CoO{sub 3−δ} synthesized using a chelating route for use in IT-SOFC cathodes: Microstructure, surface chemistry and electrical conductivity

Journal Article Scurtu, Rares; Somacescu, Simona; Calderon-Moreno, Jose; ... - Journal of Solid State Chemistry

Nanocrystalline Sm{sub 0.5}Sr{sub 0.5}CoO{sub 3−δ} powders were synthesized by a chelating route using different polyfunctional H{sub x}APC acids (APC=aminopolycarboxylate; x=3, 4, 5). Different homologous aminopolycarboxylic acids, namely nitrilotriacetic (H{sub 3}nta), ethylenediaminetetraacetic (H{sub 4}edta), 1,2-cyclohexanediaminetetracetic (H{sub 4}cdta) and diethylenetriaminepentaacetic (H{sub 5}dtpa) acid, were used as chelating agents to combine Sm, Sr, Co elements into a perovskite structure. The effects of the chelating agents on the crystalline structure, porosity, surface chemistry and electrical properties were investigated. The electrical properties of the perovskite-type materials emphasized that their conductivities in the temperature range of interest (600–800 °C) depend on the nature of the precursorsmore »« less
https://doi.org/10.1016/J.JSSC.2013.10.044

Similar Records