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Showing 1 to 13 of 13 for “"Pnictide"”.
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Pnictide und Oxopnictate der schweren Alkalimetalle : Darstellung, Charakterisierung und Kristallchemie
… Charkaterisierung <br>neuer Alkalimetallpnictide AxMy und - pnictate AxMyOz. <br> <br>Zahlreiche bisher lediglich aus thermischen Untersuchungen bekannte <br>(z.B. A3M7, A3M11) <br>sowie einige neue (z.B. CsAs, Cs5Sb8) <br>bin'are Arsenide, Antimonide und Bismutide <br>wurden aus den …
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High-temperature superconductivity in a family of iron pnictide materials
… to create high-quality samples of various Iron Pnictide superconductors, to dope them with various chemicals and to characterise the resulting crystalline samples. I discuss in depth the signature of good quality crystals and the various experiments that they have been used in by myself and my …
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Syntheses, Characterizations, and Properties of Suboxides and Layered Titanium-based Pnictide Oxide Superconductors
… by the search for new classes of layered pnictide oxide superconductors, the compound BaTi2Sb2O was synthesized by high-temperature solid-state reaction within inert container. Its crystal structure was determined using X-ray powder diffraction and Rietveld refinement. BaTi2Sb2O …
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X-ray scattering studies of charge density waves in cuprate and pnictide superconductors
This Dissertation was approved for publication on 2020-12-17 at 08:47.
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Modification of Iron pnictide and MgB2 thin films using focused He+ ion beam irradiation for superconducting devices
Continued pursuit of better superconducting devices and an understanding of how the focused ion beam evolves in a complex material are the primary motivations behind this work. The materials of interest are MgB2 and Co-doped Ba122. Superconducting properties of MgB2 were discovered in 2001. It is …
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Pressure Induced Quantum Phase Transitions in Metallics Oxides and Pnictides
… metal oxide and the latter is a ternary metal pnictide. A major component of this work was the development of the ultra-high pressure measurements by means of Anvil cells. A novel design is introduced which minimizes the alignment accessory components hence, making the cell more robust and …
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Polar intermetallic compounds of the silicon and arsenic family elements and their ternary hydrides and fluorides
… of alkaline-earth and divalent rare-earth metal pnictide (Pn) and tetrelide (Tt) phases A5(Pn,Tt,)3Zx, where A = Ca, Sr, Ba, Sm, Eu, Yb; Pn = As, Sb, Bi; Tt = Si, Ge, Sn, Pb and Z = H, F. Several trivalent rare-earth-metal pnictides, RE5Pn3 (RE = Y, La, Gd, Tb, Dy, Ho, Er, Tm) and …
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Investigation of Iron-Based and Topological Superconductors via Point-Contact Spectroscopy
… mechanisms. Point-contact spectra of the iron pnictide BaFe_{1-x}$Pt$_x$As$_2$ are consistent with a two-gap isotropic s-wave model. This conclusion is supported by previously published results from thermal conductivity, angle-resolved photoemission spectroscopy (ARPES), and Raman spectroscopy, …
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Dynamic Properties of Materials: Phonons from Neutron Scattering
… -- relaxor ferroelectrics and high temperature pnictide superconductors. The conclusions draw together the different strands of the work, discussing the importance of these new advances together with future developments and scientific applications.
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Ternary Rare-Earth Coinage Metal Arsenides LnTAs2, Sm2Cu3As3; Quaternary Arsenide Oxides Sm2CuAs3O and Selenides KGd2CuSe4, KLn2Cu3Se5, and K2Ln4Cu4Se9 (Ln = Y, La - Nd, Sm, Gd - Lu; T = Cu, Ag, Au): Syntheses, Crystal Structures and Physical Properties
… is thus the first quaternary rare-earth pnictide oxide with a distorted As net. The quaternary potassium rare-earth copper selenides KGd2CuSe4, KLn2Cu3Se5 (Ln = Ho, Er, Tm), and K2Ln4Cu4Se9 (Ln = Dy, Y) extend three series of previously described sulfide and selenide compounds. All three …
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Correlated low temperature states of YFe2Ge2 and pressure metallised NiS2
… in the material, making it a rare case of a non-pnictide and non-chalcogenide iron based superconductor with the 1-2-2 structure. This thesis describes growth and study of a new generation of high quality YFe$_{2}$Ge$_{2}$ samples with residual resistance ratios reaching 200. Measurements of …
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Manipulating superconductivity in cuprates with selective ultrafast excitation
… work exploring the superconducting state of the pnictide superconductor Sr(Fe_(1-x)Co_(x))_(2)As_(2) (Sr-122). The iron-based high temperature superconductors are unique in that multiple Fermi surfaces, with either electron-like or hole-like character, participate in the condensate. They are …