OpenAccess

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2017-11-10
11:28
OpenAccess [FZJ-2017-07202] Journal Article
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Magnetically induced ferroelectricity in Bi$_2$CuO$_4$
ddc:530
The tetragonal copper oxide Bi2CuO4 has an unusual crystal structure with a three-dimensional network of well separated CuO4 plaquettes. The spin structure of Bi2CuO4 in the magnetically ordered state below TN∼43 K remains controversial. [...]

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2017-11-10
11:28
OpenAccess [FZJ-2017-07201] Journal Article
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Simulation and optimization of a new focusing polarizing bender for the diffuse neutrons scattering spectrometer DNS at MLZ6G4
ddc:530
We present the concept and the results of the simulations of a new polarizer for the diffuse neutron scattering spectrometer DNS at MLZ. The concept of the polarizer is based on the idea of a bender made from the stack of the silicon wafers with a double-side supermirror polarizing coating and absorbing spacers in between. [...]

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2017-11-10
11:28
OpenAccess [FZJ-2017-07200] Journal Article
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Single-crystal growth and physical properties of 50% electron-doped rhodate Sr$_{1.5}$La$_{0.5}$RhO$_4$
ddc:530
Centimeter-sized single crystals of Sr1.5La0.5RhO4 were grown by the floating zone method at oxygen pressures of 20 bar. The quality of our single crystals was confirmed by x-ray Laue, powder and single crystal x-ray diffraction, neutron and x-ray absorbtion spectroscopy measurements. [...]

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2017-11-10
11:28
OpenAccess [FZJ-2017-07008] Journal Article

No case against scattering theory
ddc:000
In a series of papers, Frauenfelder et al. (1⇓–3) propose a radical reinterpretation of incoherent neutron scattering by complex systems, specifically by protein hydration water, drawing into doubt the “currently accepted model, used for >50 y” (3) [...]

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2017-11-10
11:28
OpenAccess [FZJ-2017-06819] Journal Article
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Nanostructure of HT-PEFC Electrodes Investigated with Scattering Methods
ddc:540
The nanostructure of the electrode layer of a HT-PEFC is studied with neutron and X-ray small-angle scattering techniques. The different contrasts of the two probes provide a view on different aspects of the electrode layer [...]

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2017-09-22
11:28
OpenAccess [FZJ-2017-06677] Journal Article
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Anomalous phonons in CaFe 2 As 2 explored by inelastic neutron scattering3
ddc:530
Extensive inelastic neutron scattering measurements of phonons on a single crystal of CaFe2As2 allowed us to establish a fairly complete picture of phonon dispersions in the main symmetry directions. The phonon spectra were also calculated by density functional theory (DFT) in the local density approximation (LDA). [...]

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2017-09-22
11:28
OpenAccess [FZJ-2017-06675] Journal Article
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Pressure-driven Phase Transition in CaFeAsF at 40 and 300 K
ddc:530
We carried out systematic investigation of high pressure crystal structure and structural phase transition upto 46 GPa at 40 K and 25 GPa at 300 K in CaFeAsF using powder synchrotron x-ray diffraction experiments. Rietveld analysis of the diffraction data at 40 K reveals a structural phase transition from an orthorhombic to a monoclinic phase at Pc = 13.7 GPa, while increasing pressure. [...]

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2017-09-16
12:24
OpenAccess [FZJ-2017-06043] Journal Article
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Spinon confinement in a quasi-one-dimensional anisotropic Heisenberg magnet
ddc:530
Confinement is a process by which particles with fractional quantum numbers bind together to formquasiparticles with integer quantum numbers. The constituent particles are confined by an attractive interactionwhose strength increases with increasing particle separation and, as a consequence, individual particles arenot found in isolation. [...]

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2017-09-16
12:24
OpenAccess [FZJ-2017-05842] Journal Article
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Discussion on data correction for Polarization Analysis with a 3 He spin filter analyzer
ddc:530
Fully polarized neutron reflectometry and grazing incidence small angle neutron scattering are effective methods to explore magnetic structures on the nm to μm length scales. This paper is an outline of how to fully correct for the polarization analysis (PA) inefficiencies of such an instrument and to determine the error contributions of the neutron polarizer and analyzer. [...]

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2017-09-10
11:29
OpenAccess [FZJ-2017-06416] Journal Article
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Magnetic targeting to enhance microbubble delivery in an occluded microarterial bifurcation
ddc:570
Ultrasound and microbubbles have been shown to accelerate the breakdown of blood clots both in vitro and in vivo. Clinical translation of this technology is still limited, however, in part by inefficient microbubble delivery to the thrombus. [...]

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