FS-PEX

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2018-06-20
10:09
OpenAccess [PUBDB-2018-02336] Journal Article
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Magnetoelastic phase diagram of $\mathrm{TbNi_{2}B_{2}}C$
The magnetic phase diagram of the quaternary borocarbide $\mathrm{TbNi_{2}B_{2}}C$ is investigated by direct means and by studying magnetically induced modifications of the crystal structure. Detailed superconducting quantum interference device measurements reveal a complex phase diagram with five distinct magnetic phases [...]
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2018-06-19
13:02
[PUBDB-2018-02329] Journal Article
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Probing the Thermochromic Phase Transition in $\mathrm{CuMoO_{4}}$ by EXAFS Spectroscopy
Extended X-ray absorption fine structure (EXAFS) spectroscopy at the Mo K-edge is used to follow the thermochromic γ-to-α phase transition in copper molybdate (CuMoO4). The temperature dependence (10–300 K) of the radial distribution function (RDF) for the Mo–O atom pairs in the first coordination shell of molybdenum atoms is reconstructed by the regularization-like method from the experimental EXAFS spectra. [...]
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2018-03-27
19:52
[PUBDB-2018-01590] Journal Article
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X-ray absorption near edge spectroscopy of thermochromic phase transition in CuMoO$_4$
Thermochromic phase transition was studied in CuMoO4 using the Cu and Mo K-edge x-ray absorption spec-troscopy in the temperature range of 10–300 K. The hysteretic behavior has been evidenced from the tempera-ture dependence of the pre-edge shoulder intensity at the Mo K-edge, indicating that the transition from brownish-red γ-CuMoO$_4$ to green α-CuMoO$_4$ occurs in the temperature range of 230–280 K upon heating, whereas the α-to-γ transition occurs between 200 and 120 K upon cooling. [...]
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2018-03-05
11:59
[PUBDB-2018-01373] Journal Article
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An investigation on shear banding and crystallographic texture of Ag–Cu alloys deformed by high-pressure torsion
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2018-03-01
15:02
OpenAccess [PUBDB-2018-01352] Journal Article
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Picometer polar atomic displacements in strontium titanate determined by resonant X-ray diffraction
Physical properties of crystalline materials often manifest themselves as atomic displacements either away from symmetry positions or driven by external fields. Especially the origin of multiferroic or magnetoelectric effects may be hard to ascertain as the related displacements can reach the detection limit [...]
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2018-01-22
12:32
OpenAccess [PUBDB-2018-00717] Journal Article
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Raman and fluorescence contributions to the resonant inelastic soft x-ray scattering on $LaAlO_{3}/SrTiO_3$ heterostructures
We present a detailed study of the Ti $3d$ carriers at the interface of $LaAlO_{3}/SrTiO_3$ heterostructures by high-resolution resonant inelastic soft x-ray scattering (RIXS), with special focus on the roles of overlayer thickness and oxygen vacancies. Our measurements show the existence of interfacial Ti $3d$ electrons already below the critical thickness for conductivity [...]
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2018-01-12
11:04
[PUBDB-2018-00603] Journal Article
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Characterization of $\mathrm{A^{III}B^V}$ superlattices by means of synchrotron diffraction topography and high-resolution X-ray diffraction
New possibilities are presented for the characterization of A$^{III}$B$^V$ mixed superlattice compounds by the complementary use of synchrotron diffraction topography and rocking curves. In particular, using a synchrotron white beam and the section diffraction pattern of a 5 µm slit taken at a 10 cm film-to-crystal distance, it was possible to reproduce a set of stripes corresponding to interference fringes. [...]
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2018-01-12
10:23
Embargoed OpenAccess [PUBDB-2018-00594] Journal Article
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Element-specific density profiles in interacting biomembrane models
Surface interactions involving biomembranes, such as cell–cell interactions or membrane contacts inside cells play important roles in numerous biological processes. Structural insight into the interacting surfaces is a prerequisite to understand the interaction characteristics as well as the underlying physical mechanisms. [...]
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2018-01-11
17:09
[PUBDB-2018-00569] Journal Article
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pH-sensitive N,N-(dimethyl)-N-alkanamine-N-oxides as gene delivery vectors
Chemical papers 71(9), 1739 - 1748 () [10.1007/s11696-017-0171-2]  GO
N,N-(Dimethyl)-N-alkanamine-N-oxides C$_n$NO (n = 12 and 16) are amphiphiles that exist in neutral as well as in cationic forms depending on pH of aqueous solutions. C$_n$NO with a neutral lipid DOPE (dioleoylphosphatidylethanolamine) can form liposomes with positive surface charge in acidic pH solution. [...]
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2018-01-11
14:21
OpenAccess [PUBDB-2018-00512] Journal Article
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Picosecond amorphization of $\mathrm{SiO_{2}}$ stishovite under tension
Science advances 3(5), e1602339 - () [10.1126/sciadv.1602339]  GO
It is extremely difficult to realize two conflicting properties—high hardness and toughness—in one material. Nano-polycrystalline stishovite, recently synthesized from Earth-abundant silica glass, proved to be a super-hard, ultra-tough material, which could provide sustainable supply of high-performance ceramics. [...]
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