The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform
Jiyong Yao - One of the best experts on this subject based on the ideXlab platform.
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Syntheses, structures, physical properties, and electronic structures of Ba2MLnTe5 (M = Ga and Ln = Sm, Gd, Dy, Er, Y; M = In and Ln = Ce, Nd, Sm, Gd, Dy, Er, Y).
Inorganic chemistry, 2012Co-Authors: Wenlong Yin, Wendong Wang, Lei Bai, Kai Feng, Youguo Shi, Wenyu Hao, Jiyong YaoAbstract:The 12 new rare-earth tellurides Ba2MLnTe5 (M = Ga and Ln = Sm, Gd, Dy, Er, Y; M = In and Ln = Ce, Nd, Sm, Gd, Dy, Er, Y) have been synthesized by solid-state reactions. The two compounds Ba2GaLnTe5 (Ln = Sm, Gd) are isostructural and crystallize in the centrosymmetric space group P1, while the other 10 compounds belong to another structure type in the noncentrosymmetric space group Cmc21. In both structure types, there are one-dimensional anionic 1∞[MLnTe5]4– chains built from LnTe6 octahedra and MTe4 (M = Ga, In) tetrahedra, but the connectivity between the LnTe6 octahedra and MTe4 tetrahedra is different for the two structure types. On the basis of the diffuse-reflectance spectra, the band gaps are around 1.1–1.3 eV for these compounds. The Ba2MLnTe5 (M = Ga and Ln = Gd, Dy; M = In and Ln = Gd, Dy, Er) compounds are paramagnetic and obey the Curie–Weiss Law, while the magnetic susceptibility of Ba2InSmTe5 deviates from the Curie–Weiss Law. In addition, electronic structure calculation on Ba2MYTe5 (M =...
Wenlong Yin - One of the best experts on this subject based on the ideXlab platform.
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Syntheses, structures, physical properties, and electronic structures of Ba2MLnTe5 (M = Ga and Ln = Sm, Gd, Dy, Er, Y; M = In and Ln = Ce, Nd, Sm, Gd, Dy, Er, Y).
Inorganic chemistry, 2012Co-Authors: Wenlong Yin, Wendong Wang, Lei Bai, Kai Feng, Youguo Shi, Wenyu Hao, Jiyong YaoAbstract:The 12 new rare-earth tellurides Ba2MLnTe5 (M = Ga and Ln = Sm, Gd, Dy, Er, Y; M = In and Ln = Ce, Nd, Sm, Gd, Dy, Er, Y) have been synthesized by solid-state reactions. The two compounds Ba2GaLnTe5 (Ln = Sm, Gd) are isostructural and crystallize in the centrosymmetric space group P1, while the other 10 compounds belong to another structure type in the noncentrosymmetric space group Cmc21. In both structure types, there are one-dimensional anionic 1∞[MLnTe5]4– chains built from LnTe6 octahedra and MTe4 (M = Ga, In) tetrahedra, but the connectivity between the LnTe6 octahedra and MTe4 tetrahedra is different for the two structure types. On the basis of the diffuse-reflectance spectra, the band gaps are around 1.1–1.3 eV for these compounds. The Ba2MLnTe5 (M = Ga and Ln = Gd, Dy; M = In and Ln = Gd, Dy, Er) compounds are paramagnetic and obey the Curie–Weiss Law, while the magnetic susceptibility of Ba2InSmTe5 deviates from the Curie–Weiss Law. In addition, electronic structure calculation on Ba2MYTe5 (M =...
A Szlaferek - One of the best experts on this subject based on the ideXlab platform.
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physical properties of the rni4cu r rare earth compounds
Journal of Alloys and Compounds, 2006Co-Authors: A Kowalczyk, T Tolinski, B Andrzejewski, A SzlaferekAbstract:Abstract RNi 4 Cu (R = Y, Ce, Pr, Nd, Sm, Gd, Dy and Yb) compounds have been studied by means of the X-ray powder diffraction, magnetization, dc magnetic susceptibility, and electrical resistivity measurements. These compounds order ferromagnetically between 3.7 K (Pr) and 36.5 K (Gd). The temperature dependence of the electrical resistivity, ρ ( T ), reflects the metallic character of these compounds. Furthermore, the characteristic changes of the slope of the ρ ( T ) plots confirm the magnetic transitions. YNi 4 Cu is used as the nonmagnetic reference material. CeNi 4 Cu is paramagnetic and follows the modified Curie–Weiss Law with μ eff = 0.9 μ B /f.u. This effective magnetic moment is much lower than the free Ce 3+ ion value. At low temperatures ρ ( T ) reveals a shallow minimum characteristic of the Kondo-like effect. YbNi 4 Cu does not order magnetically down to 4 K. In the temperature range 100–300 K its magnetic susceptibility fulfills the Curie–Weiss Law with the parameters θ = −195 K and μ eff ≈ 5 μ B /f.u. This effective magnetic moment is close to the value expected for the 4f 13 configuration, i.e., 4.54 μ B .
C. H. Woo - One of the best experts on this subject based on the ideXlab platform.
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Curie-Weiss Law in thin-film ferroelectrics
Journal of Applied Physics, 2006Co-Authors: Biao Wang, C. H. WooAbstract:The stationary self-polarization field of a thin film in an open circuit is analytically solved for temperatures near the para-/ferroelectric transformation within the Ginzburg-Landau theory. For second-order ferroelectrics, or first-order ferroelectrics with a sufficiently large elastic self-energy of the transformation strain, the solution is real and stable, from which the corresponding electric susceptibility of the film can be derived. A Curie-Weiss-type relation of the permittivity is obtained for both the supercritical and subcritical temperature regimes near the transition. In the paraelectric state, the Curie parameter of the thin film is found to be independent of its thickness, whereas in the ferroelectric state, its magnitude decreases rapidly with decreasing film thickness.Department of Electronic and Information EngineeringAuthor name used in this publication: C. H. Wo
Wendong Wang - One of the best experts on this subject based on the ideXlab platform.
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Syntheses, structures, physical properties, and electronic structures of Ba2MLnTe5 (M = Ga and Ln = Sm, Gd, Dy, Er, Y; M = In and Ln = Ce, Nd, Sm, Gd, Dy, Er, Y).
Inorganic chemistry, 2012Co-Authors: Wenlong Yin, Wendong Wang, Lei Bai, Kai Feng, Youguo Shi, Wenyu Hao, Jiyong YaoAbstract:The 12 new rare-earth tellurides Ba2MLnTe5 (M = Ga and Ln = Sm, Gd, Dy, Er, Y; M = In and Ln = Ce, Nd, Sm, Gd, Dy, Er, Y) have been synthesized by solid-state reactions. The two compounds Ba2GaLnTe5 (Ln = Sm, Gd) are isostructural and crystallize in the centrosymmetric space group P1, while the other 10 compounds belong to another structure type in the noncentrosymmetric space group Cmc21. In both structure types, there are one-dimensional anionic 1∞[MLnTe5]4– chains built from LnTe6 octahedra and MTe4 (M = Ga, In) tetrahedra, but the connectivity between the LnTe6 octahedra and MTe4 tetrahedra is different for the two structure types. On the basis of the diffuse-reflectance spectra, the band gaps are around 1.1–1.3 eV for these compounds. The Ba2MLnTe5 (M = Ga and Ln = Gd, Dy; M = In and Ln = Gd, Dy, Er) compounds are paramagnetic and obey the Curie–Weiss Law, while the magnetic susceptibility of Ba2InSmTe5 deviates from the Curie–Weiss Law. In addition, electronic structure calculation on Ba2MYTe5 (M =...
