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Title: Magnetic properties of La{sub 1−x}Sr{sub x}MnO{sub 3} nanoparticles prepared in a molten salt

Single phase La{sub 1−x}Sr{sub x}MnO{sub 3} nanoparticles (x = 0.18 − 0.37) are prepared by a novel way in molten NaNO{sub 2} at 500 °C. Their rhombohedral perovskite structure is confirmed by XRD patterns and exact chemical composition is determined by XRF (X-ray fluorescence) spectroscopy. The mean size of the as-prepared crystallites is of about 50 nm, the grains are rather separated and do not form sintering bridges that were typical for products synthesized by sol-gel routes followed by annealing. On the other hand, the synthesized nanoparticles exhibit rather low magnetization and decreased Curie temperature. Their neutron diffraction study indicates a complex magnetic ordering together with anomalously high atomic displacements factors that decreased considerably after annealing the samples at elevated temperature.
Authors:
;  [1] ;  [2] ; ; ;  [3] ;  [4] ;  [1]
  1. Faculty of Science, Charles University in Prague, Hlavova 8, Praha 2, 128 43 (Czech Republic)
  2. (Czech Republic)
  3. Institute of Physics, AS CR, Cukrovarnická 10, Praha 6, 162 00 (Czech Republic)
  4. Faculty of Nuclear Sciences and Physical Engineering, CTU, Břehová 7, Praha 1, 115 19 (Czech Republic)
Publication Date:
OSTI Identifier:
22273748
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ANNEALING; ATOMIC DISPLACEMENTS; CURIE POINT; LANTHANUM COMPOUNDS; MAGNETIC MATERIALS; MAGNETIC PROPERTIES; MAGNETIZATION; MANGANATES; MOLTEN SALTS; NANOSTRUCTURES; NEUTRON DIFFRACTION; NITRITES; PARTICLES; SINTERING; SODIUM COMPOUNDS; SOL-GEL PROCESS; STRONTIUM COMPOUNDS; TRIGONAL LATTICES; X-RAY DIFFRACTION; X-RAY FLUORESCENCE ANALYSIS