First experiments at the Swiss Light Source Materials Science beamline powder diffractometer

Gozzo, F.; Schmitt, B.; Bortolamedi, Th.; Giannini, Cinzia; Guagliardi, Antonietta; Lange, M.; Meister, D.; Maden, D.; Willmott, P. R.; Pàtterson, B. D.

doi:10.1016/s0925-8388(03)00585-1

Cited by 42 publications

(48 citation statements)

References 13 publications

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“…5(b), note the good agreement for the superlattice reflections. By using the FINDSYM program [19], the symmetry of the refined modulated structure was determined to be C2/m, with a = 10.357 35 (15), b = 7.195 62 (11), c = 10.454 72 (5), and β = 90.0206 (11) • . In the modulated structure, the octahedral Mn(B) site splits into one Mn 4+ site with an 8j general position and two Mn 3+ sites (4e-4f ).…”

Section: Mn-b2 Mn-a'mentioning

confidence: 99%

Commensurate structural modulation in the charge- and orbitally ordered phase of the quadruple perovskite(NaMn3)Mn4O12

et al. 2014

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By means of synchrotron x-ray and electron diffraction, we studied the structural changes at the charge order transition T CO = 176 K in the mixed-valence quadruple perovskite (NaMn 3)Mn 4 O 12. Below T CO we find satellite peaks indicating a commensurate structural modulation with the same propagation vector q = (1/2,0, −1/2) of the CE magnetic structure that orders at low temperatures, similarly to the case of simple perovskites such as La 0.5 Ca 0.5 MnO 3. In the present case, the modulated structure, together with the observation of a large entropy change at T CO , gives evidence of a rare case of full Mn 3+ /Mn 4+ charge and orbital order, consistent with the Goodenough-Kanamori model.

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Section: Mn-b2 Mn-a'mentioning

confidence: 99%

Commensurate structural modulation in the charge- and orbitally ordered phase of the quadruple perovskite(NaMn3)Mn4O12

et al. 2014

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“…aberration-free optics such as those available at the SLS-MS beamline [4][5][6]. Under these conditions the profile broadening due to the optics can be considered purely Gaussian [4]; optimal calibration of the diffractometer and the detector [1]; negligible absorption effects.…”

Section: Aberrations In Debye-scherrer Geometrymentioning

confidence: 99%

“…All these aberrations are here analytically modelled for the case of a virtually aberration-free optics and fully parallel beam, as the Materials Science (MS) beamline at the SLS [4][5][6] can provide. The resulting expressions can be seamlessly incorporated in any data analysis program so as to be fully taken into account.…”

Section: Introductionmentioning

confidence: 99%

Instrumental profile of MYTHEN detector in Debye-Scherrer geometry

Gozzo¹,

Cervellino

Leoni

et al. 2010

Zeitschrift für Kristallographie

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Instrumental line profile / Profile aberrations / Synchrotron radiation XRPD / Debye-Scherrer geometry / Position sensitive detector / MYTHEN / TOPAS / PM2K / WPPM Abstract. The main aberrations affecting data collected with 1D position sensitive detectors in Debye-Scherrer capillary geometry are examined, and analytical corrections proposed. The equations are implemented in two of the most advanced software based on the Rietveld and Whole Powder Pattern Modelling methods, respectively, for structure and microstructure analysis. Application to MYTHEN, a fast single photon counting detector developed at the Swiss Light Source, is discussed in detail.

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“…KeV and a size of 400 × 200 µm 2 is selected and the diffraction patterns are recorded with the MYTHEN II microstrip detector [17]. The diffraction peaks are fitted with a split Pearson-VII function plus a linear function (for background noise) and information about full-width-at half-maximum (FWHM), integral width (iw) and peak position (θ) are extracted.…”

Section: In-situ Tensile Testingmentioning

confidence: 99%

Deformation behavior of nano-porous polycrystalline silver. Part II: Simulations

et al. 2017

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Three-dimensional finite element simulations of nano-porous silver structures are performed to understand the correlation between the porous morphology and the mechanical behavior. The nanostructures have been obtained from ptychographic X-ray computed tomography. The simulations allow distinguishing between the interplay and role of the ligament size, the pore morphology and the porosity, and therefore provide a better comprehension of the experimental observations. We show that the proposed model has a predictive character for mechanical behavior of nano-porous silver.

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First experiments at the Swiss Light Source Materials Science beamline powder diffractometer

Cited by 42 publications

References 13 publications

Commensurate structural modulation in the charge- and orbitally ordered phase of the quadruple perovskite(NaMn3)Mn4O12

Commensurate structural modulation in the charge- and orbitally ordered phase of the quadruple perovskite(NaMn3)Mn4O12

Instrumental profile of MYTHEN detector in Debye-Scherrer geometry

Deformation behavior of nano-porous polycrystalline silver. Part II: Simulations

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