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Journal ArticleDOI

Rietveld refinement of Sm0.55Sr0.45Mn0.4Fe0.6O3

01 Mar 2020-Powder Diffraction (Cambridge University Press (CUP))-Vol. 35, Iss: 1, pp 31-33
TL;DR: In this article, single crystals of Sm0.55Sr0.4Fe0.6O3 were grown by an optical floating zone technique in an oxygen atmosphere and the powder X-ray diffraction pattern for the grown crystal revealed single-crystalline nature.
Abstract: Single crystals of Sm0.55Sr0.45Mn0.4Fe0.6O3 were grown by an optical floating zone technique in an oxygen atmosphere. The powder X-ray diffraction pattern for the grown crystal revealed single-crystalline nature. The lattice parameters and atomic structure were refined and indexed using a General Structure Analysis System (GSAS) to an orthorhombic structure with lattice parameters a = 5.4415 (32) A, b = 7.6994 (27) A, c = 5.43868 (28) A, and space group Pnma.
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Journal ArticleDOI
TL;DR: VESTA has been upgraded to the latest version, VESTA 3, implementing new features including drawing the external mor­phology of crystals, and an extended bond-search algorithm to enable more sophisticated searches in complex molecules and cage-like structures.
Abstract: VESTA is a three-dimensional visualization system for crystallographic studies and electronic state calculations. It has been upgraded to the latest version, VESTA 3, implementing new features including drawing the external mor­phology of crystals; superimposing multiple structural models, volumetric data and crystal faces; calculation of electron and nuclear densities from structure parameters; calculation of Patterson functions from structure parameters or volumetric data; integration of electron and nuclear densities by Voronoi tessellation; visualization of isosurfaces with multiple levels; determination of the best plane for selected atoms; an extended bond-search algorithm to enable more sophisticated searches in complex molecules and cage-like structures; undo and redo in graphical user interface operations; and significant performance improvements in rendering isosurfaces and calculating slices.

15,053 citations


"Rietveld refinement of Sm0.55Sr0.45..." refers methods in this paper

  • ...The crystal structure of SSMFO crystal has been drawn by using the Vesta software (Momma and Izumi, 2011) which is shown in Figure 1....

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Journal ArticleDOI
TL;DR: In this article, the effect of Fe doping on structural, magnetic and magnetocaloric properties of Nd0.67Ba0.33Mn1−xFexO3 (0≤x≤0.1) manganites was investigated.

97 citations


Additional excerpts

  • ...33Mn1−xFexO3 (Hcini et al., 2014)....

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Journal ArticleDOI
TL;DR: In this article, the effect of Fe doping on the ferromagnetic Nd{sub 0.7}Pb{sub 1-x}Fe{sub x}O{sub 3} (x=0, 0.1) phases has been studied in order to analyze the double exchange interaction.

33 citations


"Rietveld refinement of Sm0.55Sr0.45..." refers background in this paper

  • ...Doping of other transition metals in Mn site results in the reduction of mobile electrons (Blanco et al., 2006)....

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  • ...Colossal magnetoresistance (CMR) behaviour is observed in these manganites due to hole doping of divalent ions like Sr, Ca, and Ba (Blanco et al., 2006)....

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  • ...The iron doping has not shown appreciable structural changes, but the metallic conduction and ferromagnetism were apparently reduced (Blanco et al., 2006)....

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Journal ArticleDOI
TL;DR: In this paper, the authors proposed that both the reduced spin polarization of conduction electrons and the increased spin-flip scattering are responsible for the decrease of LFMR*, while the weakened ferromagnetic spin interaction at the grain boundaries is responsible for enhanced HFMR.
Abstract: Polycrystalline La0.7Sr0.3Mn1−xFexO3 thin films, with x=0–0.12, have been prepared on (001)-Si substrates using pulsed laser deposition. The films consist of fine grains with an average size of 60–80 nm. For those films, the metal–insulator transition temperature, Tp, is much lower than the Curie temperature, TC. The high field magnetoresistance, HFMR, is nearly temperature independent for x<0.08, whereas the extrapolated low field magnetoresistance at zero field, LFMR*, decreases rapidly with increasing temperature. Moreover, Fe doping significantly decreases LFMR* and enhances HFMR at low temperatures. We propose that for the Fe-doped films, both the reduced spin polarization of conduction electrons and the increased spin-flip scattering are responsible for the decrease of LFMR*, while the weakened ferromagnetic spin interaction at the grain boundaries is responsible for the enhanced HFMR.

25 citations

Journal ArticleDOI
TL;DR: The effect of Fe doping on the Mn site in the ferromagnetic phases of the perovskite Nd 0.67 Sr 0.33 Mn 1− x Fe x O 3 single crystals grown by the floating zone method has been studied.

13 citations


Additional excerpts

  • ...O–Fe) interactions (Takeuchi et al., 2001)....

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