FS-PS

 2020-01-2313:45 [PUBDB-2020-00519] Patent et al A multilayer device having an improved antiferromagnetic pinning layer and a corresponding manufacturing method Restricted: PDF PDF (PDFA); 2020-01-2311:30 [PUBDB-2020-00518] Journal Article et al Ghost imaging at an XUV free-electron laser Here we present the results of a classical ghost imaging experiment accomplished at an XUV free-electronlaser (FEL). To perform such experiment at an FEL source each x-ray pulse was transmitted through a movingdiffuser, which created a noncorrelated speckled beam. [...] Restricted: PDF PDF (PDFA); External link: Fulltext 2020-01-1511:28 [PUBDB-2020-00283] Journal Article et al Towards a quantitative determination of strain in Bragg Coherent X-ray Diffraction Imaging: artefacts and sign convention in reconstructions Scientific reports 9(1), 17357 (2019) [10.1038/s41598-019-53774-2]   Bragg coherent X-ray diffraction imaging (BCDI) has emerged as a powerful technique to image the localdisplacement field and strain in nanocrystals, in three dimensions with nanometric spatial resolution.However, BCDI relies on both dataset collection and phase retrieval algorithms that can induce artefactsin the reconstruction. Phase retrieval algorithms are based on the fast Fourier transform (FFT). [...] OpenAccess: PDF PDF (PDFA); 2020-01-1414:05 [PUBDB-2020-00211] Journal Article et al Possible $H_{2}O$ storage in the crystal structure of $CaSiO_{3}$ perovskite   The lower mantle is believed to contain much less hydrogen (or H2O) because of the low storage capacity of the dominant mineral phases, such as bridgmanite and ferropericlase. However, possible hydrogen storage in the third most abundant mineral in the region, CaSiO3 perovskite (Ca-Pv), is not well unknown. [...] External link: Fulltext 2020-01-1319:18 [PUBDB-2020-00165] Journal Article et al Light-induced spin transition in the spin-crossover complex FePt2 detected by optical pump -coherent resonant nuclear elastic scattering Hyperfine interactions 241(1), 12 (2020) [10.1007/s10751-019-1673-9]   We report the results of optical pump-nuclear resonance probe experiments on the SCO complex [FeII(L-PtII(t-but-tpy))2](BF4)2 with L being 2,6-di(pyrazol-1-yl)-4-(trimethylsilylethynyl)pyridine) and t-but-tpy being 4,4′,4″-Tri-tert-Butyl-2,2′:6′,2″-terpyridine using a novel experimental set-up at the beamline P01, Petra III, DESY Hamburg. We investigate the changes in the spin state of the complex when it is excited by laser pulses of 766 nm wavelength and pulse width < 100 ps. [...] Restricted: PDF PDF (PDFA); 2020-01-1316:06 [PUBDB-2020-00149] Journal Article et al Advanced integrated optical spectroscopy system for diamond anvil cell studies at GSECARS High pressure research 39(3), 457 - 470 (2019) [10.1080/08957959.2019.1647536]   Raman and optical spectroscopy are versatile tools for nondestructive characterization of a wide range of properties of novel materials and minerals in situ at extreme and ambient conditions. These techniques are genuinely complementary to X-ray tools (diffraction and spectroscopy) in the probe energy, momentum transfer, and time scale, making concomitant X-ray and optical probes available for advanced sample analysis. [...] 2020-01-1314:07 [PUBDB-2020-00134] Journal Article et al Decomposing electronic and lattice contributions in optical pump – X-ray probe transient inner-shell absorption spectroscopy of CuO Faraday discussions 216, 414 - 433 (2019) [10.1039/C8FD00236C]   Electronic and lattice contributions to picosecond time-resolved X-ray absorption spectra (trXAS) of CuO at the oxygen K-edge are analyzed by comparing trXAS spectra, recorded using excitation wavelengths of 355 nm and 532 nm, to steady-state, temperature-dependent XAS measurements. The trXAS spectra at pump-probe time-delays ≥150 ps are dominated by lattice heating effects. [...] 2020-01-0920:17 [PUBDB-2020-00098] Journal Article et al Time-Resolved sub-Ångström Metrology by Temporal Phase Interferometry near X-Ray Resonances of Nuclei Physical review letters 123(15), 153902 (2019) [10.1103/PhysRevLett.123.153902]   We introduce an analytical phase-reconstruction principle that retrieves atomic scale motion via timedomaininterferometry. The approach is based on a resonant interaction with high-frequency light and doesnot require temporal resolution on the time scale of the resonance period. [...] OpenAccess: PDF PDF (PDFA); 2019-12-1815:56 [PUBDB-2019-05420] Journal Article et al Gas-Induced Segregation in Pt-Rh Alloy Nanoparticles Observed by In Situ Bragg Coherent Diffraction Imaging Physical review letters 123(24), 246001 (2019) [10.1103/PhysRevLett.123.246001]   Bimetallic catalysts can undergo segregation or redistribution of the metals driven by oxidizing andreducing environments. Bragg coherent diffraction imaging (BCDI) was used to relate displacement fieldsto compositional distributions in crystalline Pt-Rh alloy nanoparticles. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2019-12-1217:57 [PUBDB-2019-05142] Journal Article et al Evaluation of the performance of classification algorithms for XFEL single-particle imaging data IUCrJ 6(2), 331 - 340 (2019) [10.1107/S2052252519001854]   Using X-ray free-electron lasers (XFELs), it is possible to determine threedimensionalstructures of nanoscale particles using single-particle imagingmethods. Classification algorithms are needed to sort out the single-particlediffraction patterns from the large amount of XFEL experimental data.However, different methods often yield inconsistent results. [...] Fulltext: PDF PDF (PDFA); External link: Fulltext