Hyperfine interactions at europium sites in oxide glasses

1996 ◽  
Vol 53 (10) ◽  
pp. 6197-6202 ◽  
Author(s):  
G. Concas ◽  
F. Congiu ◽  
C. Muntoni ◽  
M. Bettinelli ◽  
A. Speghini
Keyword(s):  
Hyperfine Interactions ◽  
Oxide Glasses

Hyperfine Interactions at Lanthanide Sites in Europium Doped Oxide Glasses

2000 ◽  
Vol 55 (5) ◽  
pp. 499-506 ◽  
Author(s):  
G. Concas ◽  
F. Congiu ◽  
G. Spano ◽  
A. Speghini ◽  
K. Gatterer ◽  
...  
Keyword(s):  
Isomer Shift ◽  
Line Width ◽  
Interaction Parameter ◽  
Hyperfine Interactions ◽  
Optical Basicity ◽  
Oxide Glasses ◽  
Borosilicate Glasses ◽  
Quadrupolar Interaction ◽  
The Eu ◽  
Doped Oxide

Abstract A series of europium doped Na2O-B2O3-SiO2, PbO-GeO2 and ZnOTeO2 glasses was investi-gated by means of151 Mössbauer spectroscopy. The distortion of the Eu sites has been evaluated in the Na2O-B2O3-SiO2 glasses by means of the quadrupolar interaction parameter and the asym-metry parameter; the disorder has been estimated by the line width. The occupancy of the sites in the borosilicate glasses is discussed. The correlation of the isomer shift with the optical basicity of the glass is discussed in terms of the degree of covalence of the Eu-O bond.

TEM studies of amorphization processes and amorphous structures

1988 ◽  
Vol 46 ◽  
pp. 448-449
Author(s):  
T. E. Mitchell ◽  
R. B. Schwarz
Keyword(s):  
Amorphous Materials ◽  
Fission Products ◽  
Rapid Quenching ◽  
Surface Films ◽  
List Type ◽  
Oxide Glasses ◽  
Crystalline Materials ◽  
Amorphous Structures ◽  
Amorphous Surface ◽  
Interfacial Films

Traditional oxide glasses occur naturally as obsidian and can be made easily by suitable cooling histories. In the past 30 years, a variety of techniques have been discovered which amorphize normally crystalline materials such as metals. These include [1-3]:Rapid quenching from the vapor phase.Rapid quenching from the liquid phase.Electrodeposition of certain alloys, e.g. Fe-P.Oxidation of crystals to produce amorphous surface oxide layers.Interdiffusion of two pure crystalline metals.Hydrogen-induced vitrification of an intermetal1ic.Mechanical alloying and ball-milling of intermetal lie compounds.Irradiation processes of all kinds using ions, electrons, neutrons, and fission products.We offer here some general comments on the use of TEM to study these materials and give some particular examples of such studies.Thin specimens can be prepared from bulk homogeneous materials in the usual way. Most often, however, amorphous materials are in the form of surface films or interfacial films with different chemistry from the substrates.

ELECTRIC HYPERFINE INTERACTIONS OF IRON IN DIMERIC STATE IN METALS

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-576-C2-578 ◽  
Author(s):  
B. D. Sawicka ◽  
J. A. Sawicki
Keyword(s):  
Hyperfine Interactions

HYPERFINE INTERACTIONS IN DyFe2

1980 ◽  
Vol 41 (C1) ◽  
pp. C1-199-C1-200 ◽  
Author(s):  
St. Japa ◽  
K. Krop ◽  
M. Przybylski
Keyword(s):  
Hyperfine Interactions

Hyperfine Interactions in Copper Sites of Dielectric and Superconducting Copper Metal Oxides

2020 ◽  
Vol 46 (11) ◽  
pp. 1100-1102
Author(s):  
E. I. Terukov ◽  
A. V. Marchenko ◽  
A. A. Luzhkov ◽  
P. P. Seregin ◽  
K. B. Shakhovich
Keyword(s):  
Metal Oxides ◽  
Hyperfine Interactions ◽  
Copper Metal ◽  
Copper Sites
Sign in / Sign up

Export Citation Format

Share Document