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2017-12-08
09:33
[PUBDB-2017-12965] Journal Article
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Kinetic alteration of the $6Mg(NH_{2} )_{2}–9LiH–LiBH_{4}$ system by co-adding $YCl_{3}$ and $Li_{3}N$
ddc:540
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2017-12-08
09:03
[PUBDB-2017-12953] Journal Article
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Sulfur-bearing metallic glasses: A new family of bulk glass-forming alloys
ddc:670
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2017-12-08
01:56
[PUBDB-2017-12924] Journal Article
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Origin of shear induced β to ω transition in Ti–Nb-based alloys
ddc:670
Ti–Nb-based alloys are essential materials for biomedical implant and aerospace applications. They reveal complex phase transformation behavior [...]
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2017-12-07
19:34
[PUBDB-2017-12923] Journal Article
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Field-free deterministic ultrafast creation of magnetic skyrmions by spin–orbit torques
ddc:600
Magnetic skyrmions are stabilized by a combination of external magnetic fields, stray field energies, higher-order exchange interactions and the Dzyaloshinskii–Moriya interaction (DMI). The last favours homochiral skyrmions, whose motion is driven by spin–orbit torques and is deterministic, which makes systems with a large DMI relevant for applications. [...]

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2017-12-07
19:13
OpenAccess [PUBDB-2017-12922] Journal Article
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Quantum phase transitions in $Ba_{(1−x)}Ca_{x}Fe_{12}O_{19}$ ( 0 ≤ x ≤ 0.10 )
ddc:530
The ground state of $Ba_{(1−x)}Ca_{x}Fe_{12}O_{19}$ (BFO) is controversial as three different quantum states, namely, quantum paraelectric, frustrated antiferroelectric, and quantum electric dipole liquid (QEDL), have been proposed. We have investigated the quantum critical behavior of BFO as a function of chemical pressure (a nonthermal variable) generated by smaller isovalent ion Ca$^{2+}$ at the Ba$^{2+}$ site [...]
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2017-12-07
18:43
OpenAccess [PUBDB-2017-12921] Journal Article
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Incoherent Diffractive Imaging via Intensity Correlations of Hard X Rays
ddc:550
Established x-ray diffraction methods allow for high-resolution structure determination of crystals, crystallized protein structures, or even single molecules. While these techniques rely on coherent scattering, incoherent processes like fluorescence emission—often the predominant scattering mechanism—are generally considered detrimental for imaging applications. [...]
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2017-12-07
18:38
[PUBDB-2017-12920] Journal Article
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Defence by Plant Toxins in Milkweed Bugs (Heteroptera: Lygaeinae) through the Evolution of a Sophisticated Storage Compartment
ddc:590
Species of the heteropteran subfamily Lygaeinae possess special subcuticular compartments to store cardiac glycosides, plant-derived defensive compounds, which they release upon predator attack. In adults of the large milkweed bug, Oncopeltus fasciatus, these storage compartments have previously been described as a modified integument, forming a fluid-filled dorsolateral space. [...]
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2017-12-07
17:48
OpenAccess [PUBDB-2017-12919] Journal Article
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Surface, final state, and spin effects in the valence-band photoemission spectra of LaCoO$_{3}$ (001)
ddc:530
The electronic structure of a LaCoO$_{3}$(001) perovskite is analyzed using simulated and measured angle-resolved valence-band photoemission spectroscopy data with emphasis on the effects of the surface truncation, the final state effects, and the spin degeneracy removal. Supercell simulations reveal instability towards the formation of nonuniform spin polarization in the Co-containing layers under tensile stress [...]
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2017-12-07
17:18
[PUBDB-2017-12918] Journal Article
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Charge-Transfer-Induced Lattice Collapse in Ni-Rich NCM Cathode Materials during Delithiation
ddc:540
Ni-rich $LiNi_xCo_yMn_zO_2$ (NCM) cathode materials have great potential for application in next-generation lithium-ion batteries owing to their high specific capacity. However, they are subjected to severe structural changes upon (de)lithiation, which adversely affects the cycling stability. [...]
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2017-12-07
15:47
[PUBDB-2017-12913] Dissertation / PhD Thesis
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Strukturuntersuchungen an Flüssigkeitsgrenzflächen mittels Röntgenstreumethoden
Kiel : Unibersitätsbibliothek Kiel, 159 pp. (2017) = Dissertation, Kiel University, 2017
Structural studies of liquid interfaces were performed using X-ray diffraction and X-ray reflectivity methods.The kinetics of the potential dependent growth of a crystalline PbBrF structure at the interface between a liquid mercury electrode and an aqueous electrolyte solution containing Br-, F- and Pb2+ were studied in situ by a combination of time-resolved X-ray diffraction and electrochemical methods.These measurements confirm the known reversible formation of a PbBrF monolayer at potentials positive of the lead (de)amalgamation equilibrium potential. The formation of PbBrF is driven by the oversaturation of the solution close to the interface due to a high Pb2+ concentration, which is a result of the lead deamalgamation.The rate of the monolayer formation increases with more positive potentials.The monolayer formation is followed by the quasi-epitaxial growth of a three-dimensional PbBrF phase. [...]

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