SHORT-RANGE AND LONG-RANGE ORDER OF TITANIUM IN Ti1+xS2

1977 ◽  
Vol 38 (C7) ◽  
pp. C7-202-C7-206 ◽  
Author(s):  
R. MORET ◽  
M. HUBER ◽  
R. COMÈS
Keyword(s):  
Long Range ◽  
Short Range ◽  
Range Order ◽  
Long Range Order

Pb()O3-type Perovskites: Part I. Pair-correlation Theory of Order-disorder Phase Transition

1997 ◽  
Vol 12 (8) ◽  
pp. 2117-2126 ◽  
Author(s):  
Hyun M. Jang ◽  
Su-Chan Kim
Keyword(s):  
Long Range ◽  
Order Parameter ◽  
Short Range ◽  
Short Range Order ◽  
Pair Correlation ◽  
Range Order ◽  
Statistical Thermodynamic ◽  
Range Order Parameter ◽  
Long Range Order ◽  
Short Range Order Parameter

The limitation of the long-range order parameter and the necessity of the short-range order parameter for the thermodynamic description of Pb()O3-type perovskites are discussed. Based on the discussion, a statistical thermodynamic model that takes into account the configuration of the neighboring B-site ions (B′ and B″ cations) was developed. A pair-correlation approximation was used in the calculation of the configurational entropy and the long-range coulombic interaction energy between the nearest B-site ions. The theoretical calculations using Pb(Sc1/2Ta1/2)O3 (PST) and Pb(Sc1/2Nb1/2)O3 (PSN) systems indicate that the short-range order parameter persists over a wide range of temperatures examined (0–1800 K) and that there possibly occur consecutive long-range order-disorder transitions in the configuration of B-site cations. The possibility of the existence of short-range ordering above the long-range order-disorder transition temperature was also examined using the annealed PSN specimen as a typical example of Pb()O3-type perovskites.

Short-Range and Long-Range Order in AFM–FM Exchange Coupled Compound LiCu2(VO4)(OH)2

2019 ◽  
Vol 123 (29) ◽  
pp. 17933-17942
Author(s):  
Anatoly Koshelev ◽  
Elena Zvereva ◽  
Larisa Shvanskaya ◽  
Olga Volkova ◽  
Mahmoud Abdel-Hafiez ◽  
...  
Keyword(s):  
Long Range ◽  
Short Range ◽  
Range Order ◽  
Long Range Order

Short range order and its transformation to long range order in Ni4Mo

1998 ◽  
Vol 46 (3) ◽  
pp. 881-892 ◽  
Author(s):  
Satoshi Hata ◽  
Syo Matsumura ◽  
Noriyuki Kuwano ◽  
Kensuke Oki
Keyword(s):  
Long Range ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Long Range Order

scholarly journals Stochastic star formation and spiral structure

1985 ◽  
Vol 106 ◽  
pp. 551-558
Author(s):  
Philip E. Seiden
Keyword(s):  
Star Formation ◽  
Long Range ◽  
Molecular Cloud ◽  
Short Range ◽  
Spiral Structure ◽  
Open Cluster ◽  
Gravitational Interaction ◽  
Range Order ◽  
Ionization Front ◽  
Long Range Order

Most approaches to explaining the long-range order of the spiral arms in galaxies assume that it is induced by the long-range gravitational interaction. However, it is well-known in many fields of physics that long-range order may be induced by short-range interactions. A typical example is magnetism, where the exchange interaction between magnetic spins has a range of only 10 ångströms, yet a bar magnet can be made as large as one likes. Stochastic self-propagating star formation (SSPSF) starts from the point of view of a short-range interaction and examines the spiral structure arising from it (Seiden and Gerola 1982). We assume that the energetic processes of massive stars, stellar winds, ionization-front shocks and supernova shocks, in an OB association or open cluster can induce the creation of a new molecular cloud from cold interstellar atomic hydrogen. In turn this new molecular cloud will begin to form stars that will allow the process to repeat, creating a chain reaction. The differential rotation existing in a spiral galaxy will stretch the aggregation of recently created stars into spiral features.

Short-Range−Long-Range Order Transformation in the Bi4V2-xFexO11-ySeries

2001 ◽  
Vol 13 (1) ◽  
pp. 96-102 ◽  
Author(s):  
E. García-González ◽  
M. Arribas ◽  
J. M. González-Calbet
Keyword(s):  
Long Range ◽  
Short Range ◽  
Range Order ◽  
Long Range Order

Short‐Range Order Coexisting with Long‐Range Order in Cu3Au

1956 ◽  
Vol 27 (3) ◽  
pp. 203-206 ◽  
Author(s):  
B. W. Roberts ◽  
G. H. Vineyard
Keyword(s):  
Long Range ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Long Range Order

TRANSITION FROM SHORT-RANGE TO LONG-RANGE ORDER IN LEAD-BISMUTHATE OXIDE GLASS MATRICES

2000 ◽  
Vol 14 (29) ◽  
pp. 1025-1031 ◽  
Author(s):  
V. SIMON ◽  
R. POP ◽  
S. SIMON
Keyword(s):  
Glass Transition ◽  
Molar Volume ◽  
Long Range ◽  
Short Range ◽  
Structural Changes ◽  
Range Order ◽  
Oxide Glass ◽  
Compositional Variation ◽  
Long Range Order ◽  
Glass Matrices

Glass transition and nucleation temperatures as well as densities and molar volumes of x Bi 2 O 3·y PbO (0.5≤x/y≤4) are reported. The glass transition temperature and molar volume are further analysed in terms of structural data. The obtained results indicate the occurrence of structural changes from short range to long range order induced by the heat treatment applied at 550°C, as per DTA results. These changes depend on the x/y ratio between Bi 2 O 3 and PbO content. The compositional variation of the molar volume of untreated and heat-treated samples are evidences that both Bi 2 O 3 and PbO play the role of network formers.

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