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• W2566935330 abstract "The valence and core-level x-ray photoemission spectra (XPS), performed on an $mathrm{UF}{mathrm{e}}_{2}mathrm{A}{mathrm{l}}_{10}$ single crystal, were measured using the Al Kensuremath{alpha} radiation. The results of valence XPS show practically two separate regions of spectral intensity, one just at the Fermi level $({E}_{mathrm{F}})$ and the other one being a wide content with its maximum at about $0.8phantom{rule{0.16em}{0ex}}mathrm{eV}$ below ${E}_{mathrm{F}}$. These give rise to two electronic configurations of the $5f$ states in the studied aluminide, itinerant and localized ones, i.e., their dual character. In such a situation the corresponding valence spectra, calculated within the local density approximation (LDA), well explain the former configuration, being responsible for a metallic behavior of the studied compound. Moreover, this behavior is confirmed clearly also by our results of magnetotransport measurements. On the other hand, the obtained magnetic susceptibility, specific heat, electrical resistivity, and thermoelectric power data support very well the local character of the $5{f}^{2}$-electron configuration of the ${mathrm{U}}^{4+}$ ion in $mathrm{UF}{mathrm{e}}_{2}mathrm{A}{mathrm{l}}_{10}$ having the orthorhombic and cage-type crystal structure. Based on that configuration, the magnetic and thermal characteristics of the compound were modeled by the effective crystal field (CF) potential in the intermediate coupling scheme using initial parameters obtained by the angular overlap model (AOM). The obtained final CF parameters yielded the CF level scheme, composed of only singlets, proper for orthorhombic symmetry. Such a set of singlets reproduces in a satisfactory way both the strongly anisotropic temperature variations of the magnetic susceptibility, measured along the three main crystallographic directions, as well as the Schottky anomaly, evaluated using specific heat results of isomorphic $mathrm{ThF}{mathrm{e}}_{2}mathrm{A}{mathrm{l}}_{10}$ as a phonon reference. Also, the strongly anisotropic behavior of the Seebeck coefficient and its low temperature maxima observed for the compound studied here have been explained roughly by the CF effect." @default.
• W2566935330 created "2017-01-06" @default.
• W2566935330 creator A5007163504 @default.
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• W2566935330 date "2015-09-24" @default.
• W2566935330 modified "2023-10-18" @default.
• W2566935330 title "Electronic, magnetic, transport, and thermal properties of single-crystalline<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>UF</mml:mi><mml:msub><mml:mi mathvariant=normal>e</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi mathvariant=normal>A</mml:mi><mml:msub><mml:mi mathvariant=normal>l</mml:mi><mml:mn>10</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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• W2566935330 doi "https://doi.org/10.1103/physrevb.92.104427" @default.
• W2566935330 hasPublicationYear "2015" @default.
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