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Article
A universal scaling relation in high-temperature superconductors
Since the discovery of superconductivity at elevated temperatures in the copper oxide materials1 there has been a considerable effort to find universal trends and correlations amongst physical quantities, as a cl...
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Article
Atomic Structure Modifications of Diamond-Like Nanocomposite Films: Observation by Raman Spectroscopy, FTIR and STM
Raman spectroscopy, FTIR and scanning tunneling microscopy (STM) were used to study diamond-like nanocomposite (DLN) and metal containing DLN (Me-DLN) films. The FTIR spectra showed no appreciable absorption f...
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Article
Physical Properties of Diamond-Like Nanocomposite Films
Diamond-like nanocomposite (DLN) and metal containing DLN (Me-DLN) films, synthesized in a combined process of deposition of carbon-silicon precursor and magnetron sputtering of a metal target, have been exami...
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Chapter
The Metallic Bond for Monolayer Transition Metal Layers on Transition Metal Surfaces
This present work discusses changes in the electronic and chemical properties of some transition metal layers on transition metal substrates, and presents a simple framework for understanding the results.
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Article
Ion Beam-Assisted Deposition of Boron Nitride from a Condensed Layer of Diborane and Ammonia at 78 K
This paper examines the ion beam-assisted deposition (IBAD) of thin boron nitride films using cryogenically condensed precursors. Low energy (1100 eV) argon and (2000 eV) deuterated ammonia beams with currents...
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Article
Deposition of Dielectric Thin Films by Irradiation of Condensed Reactant Mixtures
Results of ongoing investigations of a new method for processing molecular solids to form refractory thin films are presented. We have extended past work on boron nitride and alumina growth from molecular soli...
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Article
Growth of Dielectric Thin Films by Irradiation of Condensed Molecular Precursors with Synchrotron Radiation
Spectroscopic evidence is presented that shows that boron nitride andaluminum oxide can be synthesized by exposing a condensed layer of molecular precursors to synchrotron radiation. In the A12 O3 circumstance a ...
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Article
Ion and Electron Beam Processing of Condensed Molecular Solids to Form Thin Films
Electron and ion beams can be used to deposit thin films and etch surfaces using gas phase precursors. However, the generation of undesirable gas phase products and the diffusion of the reactive species beyond...
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Article
Temperatures rise higher still
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Article
Superconductivity at high temperatures in doped oxides
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Chapter
Photoemission Studies of the High Tc Superconductor YBa2Cu3O9−δ
VUV photoemission spectra (Fig. 1) of the valence bands of the high-Tc superconductor(1) YBa2Cu3O9−δ δ=2.1, have been measured using the UV undulator (beam line U5U). Photon erergies h v = 45.0 eV and 52.0 eV lie...
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Chapter
Inductive Transition of YBa2Cu3O7−δ in the 4 MHz Frequency Range
The inductive transition of superconducting YBa2Cu3O7−δ was investigated at 4 Mhz. These measurements provide a value of the London penetration depth, λL(O), in YBa2Cu3O7−δ which differs by a factor of ≈ 10 from ...
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Chapter
Studies of the Transition Temperature and Normal State Resistivity of Nb3Ge and Nb Films
Correlations between Tc and specific features of the normal state resistance vs temperature curves are discussed for both Nb3Ge and ion damaged Nb films. Of particular interest is the correlation between Tc and ρ
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Article
Surface segregation and interaction of oxygen and nitrogen with zirconium in Nb-1% Zr alloy
Surface segregation and interaction of zirconium, oxygen and nitrogen were studied in a Nb-1 pct Zr alloy utilizing Auger electron spectroscopy. Segregation of oxygen to the surface occurs at temperatures as l...