FS-PEX

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2018-11-16
10:12
[PUBDB-2018-04551] Journal Article
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Magnetoelastic coupling at spin-glass-like transition in $\mathrm{Sr_{3}NiSb_{2}O_{9}}$
We report a characteristic spin-glass-like behavior in $\mathrm{Sr_{3}NiSb_{2}O_{9}}$, as confirmed from the low-field dc magnetometry and ac susceptibility measurements. The memory effects in the dc magnetometry exhibit similar characteristic features of the spin-glass systems. [...]
ddc:540
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2018-11-07
23:20
[PUBDB-2018-04307] Journal Article

Hard X-ray Photoelectron Spectroscopy
In this issue, experts in the field of hard X-ray photoelectron spectroscopy (HAXPES) present their current and upcoming activities at facilities worldwide. Their contributions describe state-of-the-art instrumentation and highlight the great potential of the technique by briefly presenting some recent results [...]
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ddc:530
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2018-11-07
23:14
[PUBDB-2018-04306] Journal Article
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Nature of the charge carriers in $\mathrm{LaAlO_{3}-SrTiO_{3}}$ oxide heterostructures probed using hard X-ray photoelectron spectroscopy
epl 123(4), 47003 () [10.1209/0295-5075/123/47003]  GO
A proper investigation of the valence band electronic structure is the essential first step towards understanding the intriguing co-existence of several exotic electronic phases like ferromagnetism and superconductivity, in $LaAlO_3-SrTiO_3$ heterostructures. In order to comprehend the electronic structure across the $LaAlO_3-SrTiO_3$ oxide interface, a detailed valence band investigation has been carried out using variable energy hard X-ray photoelectron spectroscopy and signatures of both low-energy coherent and high-energy features have been observed in the valence band spectra. [...]
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ddc:530
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2018-11-06
15:54
[PUBDB-2018-04226] Journal Article
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Equation of State of Polycrystalline Stishovite Across the Tetragonal-Orthorhombic Phase Transition
High‐pressure silica polymorphs may contribute to lithologies in Earth's lower mantle. Stishovite, the tetragonal rutile‐type polymorph of SiO$_2$, distorts to an orthorhombic CaCl$_2$‐type structure at pressures and temperatures of the lower mantle [...]
ddc:550
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2018-10-18
11:12
[PUBDB-2018-03830] Journal Article
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Signature of a highly spin polarized resonance state at $\mathrm{Co_{2}MnSi(0 0 1)/Ag(0 0 1)}$ interfaces
We investigated interfaces of halfmetallic Co$_2$MnSi(1 0 0) Heusler thin films with Ag(1 0 0), Cr(1 0 0), Cu and Al layers relevant for spin valves by high energy x-ray photoemission spectroscopy (HAXPES). Experiments on Co$_2$MnSi samples with an Ag(1 0 0) interface showed a characteristic spectral shoulder feature close to the Fermi edge, which is strongly diminished or suppressed at Co$_2$MnSi (1 0 0) interfaces with the other metallic layers [...]
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2018-07-16
14:59
OpenAccess [PUBDB-2018-02622] Journal Article
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$CrO_{4}$ distortion-driven ferroelectric order in $(R, Y) CrO_{4} (R=Sm , Gd, and Ho)$: A new family of multiferroics
We report a new multiferroic family of $(R,Y)CrO_4(R=Sm,Gd,$ and $Ho)$. The ferroelectric ordering temperatures are observed at much higher temperatures than their corresponding magnetic ordering temperatures for all the members. [...]
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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
Embargoed OpenAccess [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
OpenAccess [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
ddc:620
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