High-temperature photoelectron spectroscopy: a study of the alkaline earth oxides strontium oxide and barium oxide

1987 ◽  
Vol 91 (17) ◽  
pp. 4476-4481 ◽  
Author(s):  
J. M. Dyke ◽  
M. Feher ◽  
B. W. J. Gravenor ◽  
A. Morris
Keyword(s):  
High Temperature ◽  
Photoelectron Spectroscopy ◽  
Alkaline Earth ◽  
Barium Oxide ◽  
Strontium Oxide

scholarly journals X-ray Photoelectron Studies of High-temperature Superconductors: Evidence for the Importance of Alkaline Earth Metals

1989 ◽  
Vol 42 (4) ◽  
pp. 409 ◽  
Author(s):  
JF Dobson ◽  
AE Bocquet ◽  
PC Healy ◽  
S Myhra ◽  
AM Stewart ◽  
...  
Keyword(s):  
High Temperature ◽  
Binding Energy ◽  
Photoelectron Spectroscopy ◽  
Alkaline Earth ◽  
High Temperature Superconductors ◽  
Alkaline Earth Metals ◽  
X Ray ◽  
Binding Energy Peak ◽  
Energy Peak ◽  
Superconducting Ceramics

All high�temperature superconducting ceramics so far studied contain alkaline-earth ions, and in all cases core-level X-ray photoelectron spectroscopy shows an anomalous low-binding energy peak from these ions. We argue that this may point to electron-rich alkaline earth layers. These should be highly polarisable, allowing them to facilitate uperconductivity by screening the repulsion between electrons and/or holes in the CuD layers.

A gas phase investigation of titanium monoxide and atomic titanium using high temperature photoelectron spectroscopy

1984 ◽  
Vol 53 (2) ◽  
pp. 465-477 ◽  
Author(s):  
J.M. Dyke ◽  
B.W.J. Gravenor ◽  
G.D. Josland ◽  
R.A. Lewis ◽  
A. Morris
Keyword(s):  
High Temperature ◽  
Gas Phase ◽  
Photoelectron Spectroscopy ◽  
Titanium Monoxide

Effect of strontium oxide on the formation mechanism of dicalcium silicate with barium oxide and sulfur trioxide

2015 ◽  
Vol 27 (7) ◽  
pp. 381-387 ◽  
Author(s):  
Jie Zhang ◽  
Chenchen Gong ◽  
Shoude Wang ◽  
Lingchao Lu ◽  
Xin Cheng
Keyword(s):  
Formation Mechanism ◽  
Sulfur Trioxide ◽  
Barium Oxide ◽  
Dicalcium Silicate ◽  
Strontium Oxide

Xps Analysis of the Sapphire Surface as a Function of High Temperature Vacuum Annealing

1989 ◽  
Vol 159 ◽  
Author(s):  
E.D. Richmond
Keyword(s):  
High Temperature ◽  
Binding Energy ◽  
Photoelectron Spectroscopy ◽  
Vacuum Annealing ◽  
Xps Analysis ◽  
Chemical Changes ◽  
Cleaning Procedure ◽  
Sapphire Surface ◽  
X Ray ◽  
First Time

ABSTRACTFor the first time the (1102) surface of sapphire has been investigated by X-ray photoelectron spectroscopy to ascertain chemical changes resulting from annealing in vacuum at 1300° C and 1450° C. As received substrates had a substantial surface C contaminant. For substrates that were chemically cleaned before inserting them into the MBE system no trace of carbon is detected. A residual flourine contaminant results from the cleaning procedure and is desorbed by the vacuum annealing. Spectra of annealed substrates are compared to the unannealed chemically cleaned substrates. The annealed substrates exhibit 0.4 to 0.5 eV shift to higher binding energy of the Al peak and a 0.3 eV shift to higher binding energy of the O peak. In addition, a 2% depletion of oxygen from the surface occurs.

Niobium-bearing arsenides and germanides from elemental mixtures not involving niobium: a new twist to an old problem in solid-state synthesis

2018 ◽  
Vol 74 (5) ◽  
pp. 623-627 ◽  
Author(s):  
Sviatoslav Baranets ◽  
Hua He ◽  
Svilen Bobev
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Diffraction Data ◽  
Alkaline Earth ◽  
Alkaline Earth Metals ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Temperature Reactions ◽  
First Time ◽  
Synthetic Work

Three isostructural transition-metal arsenides and germanides, namely niobium nickel arsenide, Nb0.92(1)NiAs, niobium cobalt arsenide, NbCoAs, and niobium nickel germanide, NbNiGe, were obtained as inadvertent side products of high-temperature reactions in sealed niobium containers. In addition to reporting for the very first time the structures of the title compounds, refined from single-crystal X-ray diffraction data, this article also serves as a reminder that niobium containers may not be suitable for the synthesis of ternary arsenides and germanides by traditional high-temperature reactions. Synthetic work involving alkali or alkaline-earth metals, transition or early post-transition metals, and elements from groups 14 or 15 under such conditions may yield Nb-containing products, which at times could be the major products of such reactions.

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