Further band theory arguments elucidating the nature of the ordered state of the CsCl type alloy β'-CuZn

1983 ◽  
Vol 48 (9) ◽  
pp. 2454-2463
Author(s):  
Mojmír Tomášek ◽  
Štěpán Pick ◽  
Mojmír Šob
Keyword(s):  
Qualitative Analysis ◽  
Surface States ◽  
Partial Wave Analysis ◽  
Wave Analysis ◽  
Type Alloy ◽  
Band Theory ◽  
Cscl Type ◽  
Polar Model ◽  
The Difference ◽  
Ordered State

Partial wave analysis together with the qualitative analysis of hybridization in β'-CuZn is used to shed more light on special bonding conditions in which stability of this phase might originate. Results support the legitimacy of the so-called polar model of this phase. Analogy to the ordered Cu3Au alloy is mentioned, the difference being that the latter stabilizes due to a pure superstructure effect. Shockley surface states found recently on the (111) surface of Cu3Au are to be expected on the same face of α-CuZn as well.

On bonding, stability and surface states in ordered alloys: FeTi and FeAl

1983 ◽  
Vol 48 (2) ◽  
pp. 408-420 ◽  
Author(s):  
Mojmír Tomášek ◽  
Štěpán Pick ◽  
Mojmír Šob
Keyword(s):  
Qualitative Analysis ◽  
Partial Wave ◽  
Surface States ◽  
Partial Wave Analysis ◽  
Relative Importance ◽  
Wave Analysis ◽  
Ordered Alloys ◽  
Cscl Structure

Partial wave analysis together with the qualitative analysis of hybridization has been performed for two ordered alloys with CsCl structure, FeTi and FeAl. Relation to the theory of crystal superstructures and surface states is mentioned. Relative importance of covalency and ionocity in the cohesion of these compounds is treated in simple terms with the aim to better understand the nature of their stability.

Bonding and stability in the ordered alloys FeV and CoTi. Comparison with FeTi

1985 ◽  
Vol 50 (10) ◽  
pp. 2093-2100
Author(s):  
Štěpán Pick ◽  
Mojmír Tomášek ◽  
Mojmír Šob
Keyword(s):  
Phase Diagrams ◽  
Partial Wave ◽  
Partial Wave Analysis ◽  
Intermetallic Alloys ◽  
Wave Analysis ◽  
Ordered Alloys ◽  
Ordered Intermetallic ◽  
Cscl Structure ◽  
Ionic Effects

Partial wave analysis together with the qualitative examination of hybridization has been performed for two ordered intermetallic alloys with CsCl structure, FeV, and CoTi. The results resemble those obtained previously for FeTi, although important deviations are present as well. The stabilization of the ordered phase is again due to ionic effects. Qualitative arguments are suggested to explain the small stability of the CsCl phase of FeV and some differences in the FeTi and CoTi phase diagrams.

New data on the reaction K−p→Λπ0 from 1.934 to 2.516 GeV/c and partial-wave analysis for this reaction between 2070 MeV and 2436 MeV CMS energy

1975 ◽  
Vol 90 ◽  
pp. 1-19 ◽  
Author(s):  
A. de Bellefon ◽  
A. Berthon ◽  
J. Brunet ◽  
G. Tristram ◽  
J. Vrana ◽  
...  
Keyword(s):  
Partial Wave ◽  
Partial Wave Analysis ◽  
Wave Analysis

Dielectric and Mechanical Loading Effects of a Fluid on Lamb Waves Propagating in an Immersed Piezoelectric Plate

2005 ◽  
Vol 21 (3) ◽  
pp. 179-186 ◽  
Author(s):  
C.-H. Yang ◽  
Y.-A. Lai
Keyword(s):  
Lamb Waves ◽  
Piezoelectric Plate ◽  
Dispersion Curves ◽  
Partial Wave Analysis ◽  
Theoretical Treatment ◽  
Fluid Loading ◽  
Wave Analysis ◽  
Sensor Applications ◽  
Dielectric Loading ◽  
Loading Effects

AbstractThis research is focused on exploring the fluid loading effects on the dispersion curves of Lamb modes propagating in a piezoelectric plate. A theoretical treatment based on a partial wave analysis is developed to model the dispersion curves of Lamb modes propagating in an X-LiNbO3 plate loaded by a fluid with combined mechanical/dielectric properties. In particular, the mode-shifting characteristics caused by the fluid loading as a function of the propagation orientation are illustrated with numerical examples. Finally, for the case of water as an immersing fluid, individual attributions of the mechanical and dielectric loading effects causing the mode-shifting are analyzed. It is found that the dielectric loading effect dominates the mode-shifting while the mechanical density loading can be neglected while Lamb waves propagate in an X-LiNbO3 plate immersing in water. The current results provides useful information for the applications of acoustic plate mode (APM) devices used in liquid sensor applications.

Partial-wave analysis of K−p → π0Λ (1520) between 1710 and 2170 MeV c.m. energy including new data between 1775 and 1960 MeV

1977 ◽  
Vol 131 (4-5) ◽  
pp. 399-420 ◽  
Author(s):  
W. Cameron ◽  
B. Franek ◽  
G.P. Gopal ◽  
G.E. Kalmus ◽  
A.C. McPherson ◽  
...  
Keyword(s):  
Partial Wave ◽  
Partial Wave Analysis ◽  
Wave Analysis

Partial-Wave Analysis in Terms of the Homogeneous Lorentz Group

1967 ◽  
Vol 164 (5) ◽  
pp. 1981-1990 ◽  
Author(s):  
R. Delbourgo ◽  
Abdus Salam ◽  
J. Strathdee
Keyword(s):  
Partial Wave ◽  
Lorentz Group ◽  
Partial Wave Analysis ◽  
Wave Analysis ◽  
Homogeneous Lorentz Group

New experimental results on the reactions K−n → π− Σ0 and K−n → π0 Σ− and a partial-wave analysis of these data between 1750 and 2200 MeV

1977 ◽  
Vol 125 (1) ◽  
pp. 61-82 ◽  
Author(s):  
M.J. Corden ◽  
G.F. Cox ◽  
I.R. Kenyon ◽  
S.W. O'Neale ◽  
K.C.T.O. Sumorok ◽  
...  
Keyword(s):  
Partial Wave ◽  
Partial Wave Analysis ◽  
Experimental Results ◽  
Wave Analysis
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