# FS-PET-D

 2019-09-1309:02 [PUBDB-2019-03307] Journal Article et al A simple correction for the parallax effect in X-ray pair distribution function measurements 2019-09-1214:01 [PUBDB-2019-03296] Journal Article et al Evidence for pressure-induced polarization rotation, octahedral tilting, and reentrant ferroelectric phase in tetragonal $\mathrm{(Pb_{0.5}Bi_{0.5})(Ti_{0.5}Fe_{0.5})O_{3}}$ Physical review materials 3(9), 094405 (2019) [10.1103/PhysRevMaterials.3.094405]   Pressure-induced phase transition in the technologically important tetragonal phase of PbTiO$_3$ has been quite controversial with two entirely different propositions: (1) morphotropic phase boundary-like structural transition with concomitant rotation of the ferroelectric polarization vector and (2) antiferrodistortive (AFD) phase transition followed by emergence of a reentrant ferroelectric phase. We have attempted to address these controversies by enhancing the AFD instability of PbTiO$_3$ through 50% BiFeO$_3$ substitution in a tetragonal composition of the (1−x)PbTiO$_{3−x}$BiFeO$_3$ solid solution system [...] OpenAccess: PDF PDF (PDFA); 2019-09-1111:40 [PUBDB-2019-03285] Journal Article et al The equation of state of TaC$_{0.99}$ by X-ray diffraction in radial scattering geometry to 32 GPa and 1073 K Journal of applied physics 126(10), 105107 (2019) [10.1063/1.5115350]   We have performed in situ synchrotron X-ray diffraction experiments on TaC$_{0.99}$ compressed in a diamond anvil cell along 3 isothermal pathsto maximum pressure (P)-temperature (T) conditions of 38.8 GPa at 1073 K. By combining measurements performed in axial diffractiongeometry at 296 K and in radial geometry at 673 K and 1073 K, we place constraints on the pressure-volume-temperature (P-V-T) equation ofstate of TaC in a wide range of conditions. [...] Published on 2019-09-10. Available in OpenAccess from 2020-09-10.: PDF PDF (PDFA); 2019-09-1017:08 [PUBDB-2019-03277] Journal Article et al High-pressure nuclear inelastic scattering with backscattering monochromatization Journal of synchrotron radiation 26(5), 1592 - 1599 (2019) [10.1107/S1600577519008853]   The capability to perform high-pressure low-temperature nuclear inelastic scattering on $^{125}$Te and $^{121}$Sb with a sapphire backscattering monochromator is presented. This technique was applied to measure nuclear inelastic scattering in TeO$_2$ at pressures up to 10 GPa and temperatures down to 25 K. [...] OpenAccess: PDF PDF (PDFA); Restricted: PDF PDF (PDFA); 2019-08-3015:02 [PUBDB-2019-03160] Journal Article et al Pressure-induced structural dimerization in the hyperhoneycomb iridate $β−Li_{2}IrO_{3}$ at low temperatures Physical review / B 100(6), 064104 (2019) [10.1103/PhysRevB.100.064104]   A pressure-induced collapse of magnetic ordering in $β−Li_{2}IrO_3$ at $P_m ∼ 1.5–2$ GPa has previously been interpreted as evidence for possible emergence of spin liquid states in this hyperhoneycomb iridate, raising prospects for experimental realizations of the Kitaev model. Based on structural data obtained at room temperature, this magnetic transition is believed to originate in small lattice perturbations that preserve crystal symmetry, and related changes in bond-directional anisotropic exchange interactions [...] OpenAccess: PDF PDF (PDFA); 2019-08-3011:31 [PUBDB-2019-03155] Journal Article et al Electrochemical and Structural Investigation of Calcium Substituted Monoclinic $\mathrm{Li_{3}V_{2}(PO_{4})_{3}}$ Anode Materials for Li‐Ion Batteries Advanced energy materials 9(33), 1901864 (2019) [10.1002/aenm.201901864]   In this work, the effect of Li$^+$ substitution in Li$_3$V$_2$(PO$_4$)$_3$ with a large divalent ion (Ca$^{2+}$) toward lithium insertion is studied. A series of materials, with formula Li$_{3−2x}$Ca$_x$V$_2$(PO$_4$)$_3$/C (x = 0, 0.5, 1, and 1.5) is synthesized and studied in the potential region 3–0.01 V versus Li$^+$/Li. [...] OpenAccess: PDF PDF (PDFA); 2019-08-2915:49 [PUBDB-2019-03148] Journal Article et al X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells JoVE Biology [...] 150(150), 60001 (2019) [10.3791/60001]   X-ray beam induced current (XBIC) measurements allow mapping out the nanoscale performance of electronic devices such as solar cells. Ideally, XBIC is employed simultaneously with other techniques within a multi-modal X-ray microscopy approach. [...] OpenAccess: PDF; 2019-08-2915:37 [PUBDB-2019-03147] Journal Article et al Direct Visualization of Spatial Inhomogeneity of Spin Stripes Order in $\mathrm{La_{1.72}Sr_{0.28}NiO_{4}}$ Condensed Matter 4(3), 77 (2019) [10.3390/condmat4030077]   In several strongly correlated electron systems, the short range ordering of defects, charge and local lattice distortions are found to show complex inhomogeneous spatial distributions. There is growing evidence that such inhomogeneity plays a fundamental role in unique functionality of quantum complex materials [...] OpenAccess: PDF PDF (PDFA); 2019-08-2915:33 [PUBDB-2019-03146] Journal Article et al New insights into the crystallization of polymorphic materials: from real-time serial crystallography to luminescence analysis Reaction chemistry & engineering advance Article, 10.1039.C9RE00191C (2019) [10.1039/C9RE00191C]   Detailed analysis of reaction mechanisms by in situ techniques are important for detecting metastable intermediates, analysing polymorphic transitions and thereby for the discovery of new compounds. This article presents the first combination of serial crystallography with in situ luminescence and X-ray diffraction (XRD) measurements to monitor the synthesis of [Eu(phen)2(NO3)3] (phen = 1,10-phenanthroline). [...] 2019-08-2520:30 [PUBDB-2019-03101] Journal Article et al Anomalous Dynamics of Concentrated Silica-PNIPAm Nanogels The journal of physical chemistry letters 10, 5231 - 5236 (2019) [10.1021/acs.jpclett.9b01690]   We present the structure and dynamics of highly concentrated core–shell nanoparticles composed of a silica core and a poly(N-isoproylacrylamide) (PNIPAm) shell suspended in water. With X-ray photon correlation spectroscopy, we are able to follow dynamical changes over the volume phase transition of PNIPAm at LCST = 32 °C. [...] Published on 2019-08-21. Available in OpenAccess from 2020-08-21.: PDF PDF (PDFA); Restricted: PDF PDF (PDFA);