scholarly journals Vibrational entropy of disorder in Cu3Au with different degrees of short-range order

2018 ◽  
Vol 20 (29) ◽  
pp. 19441-19446 ◽  
Author(s):  
A. Benisek ◽  
E. Dachs ◽  
M. Grodzicki
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Vibrational Entropy ◽  
Dft Methods

The vibrational entropies of disorder in different short-range ordered Cu3Au were studied by calorimetric and DFT methods.

An Inelastic Nuclear Resonant Scattering Study of Partial Entropies of Ordered and Disordered Fe3Al

1999 ◽  
Vol 590 ◽  
Author(s):  
B. Fultz ◽  
W. Sturhahn ◽  
T. S. Toellner ◽  
E. E. Alp
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Resonant Scattering ◽  
Nuclear Resonant Scattering ◽  
Range Order ◽  
Vibrational Entropy ◽  
Model Calculations ◽  
Optical Modes ◽  
Scattering Spectra ◽  
Inelastic Nuclear Resonant Scattering

ABSTRACTInelastic nuclear resonant scattering spectra were measured on alloys of Fe3Al that were chemically disordered, partially-ordered, and DO3-ordered. The phonon partial DOS for 57Fe atoms were extracted from these data, and the change upon disordering in the partial vibrational entropy of Fe atoms was obtained. By comparison to previous calorimetry measurements, it is shown that the contribution of the Fe atoms to the vibrational entropy is a factor of 10 smaller than that of the Al atoms. With the assistance of Born – von Kárán model calculations on the ordered alloy, it is shown that differences in the vibrational entropy originate primarily with changes in the optical modes upon disordering. The phonon DOS of 57Fe was found to change systematically with chemical short range order in the alloy. It is argued that changes in the vibrational entropy originate primarily with changes in the chemical short-range order in the alloy, as opposed to long-range order.

Short-range order effects in amorphous FexSi1-x/Si multilayers induced by preparation conditions

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-175-Pr2-178 ◽  
Author(s):  
G. T. Pérez ◽  
F. H. Salas ◽  
R. Morales ◽  
L. M. Álvarez-Prado ◽  
J. M. Alameda
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Order Effects ◽  
Preparation Conditions

SHORT RANGE ORDER IN QUENCHED Ni4Mo

1977 ◽  
Vol 38 (C7) ◽  
pp. C7-173-C7-173
Author(s):  
J.-P. CHEVALIER ◽  
W. M. STOBBS
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order
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