The Role of Defects on Inelastic Scattering of Mössbauer Radiation near Structural Phase Transitions

1981 ◽  
Vol 106 (2) ◽  
pp. 723-730 ◽  
Author(s):  
E. V. Zolotoyabko ◽  
V. N. Kashcheev
Keyword(s):  
Phase Transitions ◽  
Inelastic Scattering ◽  
Structural Phase ◽  
Structural Phase Transitions

Reversible Luminescence Thermochromism in Dipotassiumsodium Tris[dicyanoargentate(I)] and the Role of Structural Phase Transitions

2002 ◽  
Vol 168 (1) ◽  
pp. 267-274 ◽  
Author(s):  
P. Fischer ◽  
B. Lucas ◽  
M.A. Omary ◽  
C.L. Larochelle ◽  
H.H. Patterson
Keyword(s):  
Phase Transitions ◽  
Structural Phase ◽  
Structural Phase Transitions

SELECTED PROPERTIES OF Y-Ba-Cu-O IN CONNECTION WITH THE PROPERTIES OF Cu-O CHAINS

1992 ◽  
Vol 06 (13) ◽  
pp. 2291-2319 ◽  
Author(s):  
G. UIMIN
Keyword(s):  
Phase Transitions ◽  
Lattice Gas ◽  
Structural Phase ◽  
Quantitative Interpretation ◽  
Structural Phase Transitions ◽  
Superconducting Properties ◽  
Chain Fragment ◽  
Formative Stage ◽  
Lattice Gas Models

Here we discuss some experimental evidence which supports a significant role of …-Cu-O…chain fragments, situated in oxygen deficient planes, in the doping of carriers into CuO 2 planes, in structural phase transitions and in many other normal and superconducting properties of Y-Ba-Cu-O . The relevant experiments are associated with the structural, magnetic, XAS, NMR/NQR investigations. The well-established phase diagram of YBa 2 Cu 3 O 6+x, i-e., the Néel, T N , and superconducting, T c , transition temperatures versus the oxygen content x, is the basis of the theory which should explain the structural phase transitions as well as the charge transfer mechanism. It appears that lattice-gas models do not answer all the requirements, particularly, concerned with the intrinsic chain fragments. Although the theory of the oxygen deficient plane, sharing quantum mechanics of finite chain fragments, statistical mechanics of the chain fragment ensemble as well as Monte Carlo simulations, is in its formative stage yet, it can readily apply to quantitative interpretation of selected experiments.

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