scholarly journals Temperature-dependent optical properties of CuFeO2 through the structural phase transition

RSC Advances ◽  
2021 ◽  
Vol 11 (63) ◽  
pp. 40173-40181
Author(s):  
Hsiao-Wen Chen ◽  
Chu-Yun Huang ◽  
Guo-Jiun Shu ◽  
Hsiang-Lin Liu
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Phase Transitions ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Temperature Dependent ◽  
Complex Phase ◽  
Practical Applications

Delafossite CuFeO2 has recently attracted considerable attention because of its complex phase transitions and practical applications.

Structural Phase Transition, Electronic Structures and Optical Properties of GaN

2013 ◽  
Vol 42 (2) ◽  
pp. 161-166
Author(s):  
李建华 LI Jian-hua ◽  
崔元顺 CUI Yuan-shun ◽  
陈贵宾 CHEN Gui-bin
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Structural Phase Transition ◽  
Electronic Structures ◽  
Structural Phase

Behavior of thermal properties of AgCu1−xFexS compounds under non-isothermal conditions

2019 ◽  
Vol 33 (28) ◽  
pp. 1950339 ◽  
Author(s):  
Y. I. Aliyev ◽  
P. R. Khalilzade ◽  
Y. G. Asadov ◽  
T. M. Ilyasli ◽  
F. M. Mammadov ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Thermal Properties ◽  
Phase Transitions ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Partial Replacement ◽  
Isothermal Conditions ◽  
The Given

AgCu[Formula: see text]Fe[Formula: see text]S compounds were synthesized by partial Cu[Formula: see text][Formula: see text][Formula: see text]Fe replacement in the AgCuS crystal at a concentration range of 0[Formula: see text][Formula: see text][Formula: see text]x[Formula: see text][Formula: see text][Formula: see text]0.03. In the differential thermal analysis spectrum obtained at a temperature range of 300 K[Formula: see text][Formula: see text][Formula: see text]T[Formula: see text][Formula: see text][Formula: see text]1300 K, endoeffect corresponding to the structural phase transition in the AgCuS compound was observed at the temperature T[Formula: see text]=[Formula: see text]938 K. It has been determined that this result is also observed in the AgCu[Formula: see text]Fe[Formula: see text]S compound obtained by partial replacement of Cu atoms by Fe atoms. However, in the compound of AgCu[Formula: see text]Fe[Formula: see text]S this effect was observed at higher temperatures. The thermal capacities and enthalpies of phase transitions were calculated for the given compounds.

Optical properties of hexagonal BaTiO3 around the 222 K structural phase transition

1986 ◽  
Vol 60 (5) ◽  
pp. 445-448 ◽  
Author(s):  
Y. Akishige ◽  
N. Yokozeki ◽  
M. Kobayashi ◽  
E. Sawaguchi
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Structural Phase Transition ◽  
Structural Phase

scholarly journals Optical properties, lattice dynamics, and structural phase transition in hexagonal2H−BaMnO3single crystals

2015 ◽  
Vol 92 (13) ◽  
Author(s):  
T. N. Stanislavchuk ◽  
A. P. Litvinchuk ◽  
Rongwei Hu ◽  
Young Hun Jeon ◽  
Sung Dae Ji ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Structural Phase Transition ◽  
Lattice Dynamics ◽  
Structural Phase

A structural phase transition in NaTaOGeO4 and its relation to phase transitions in titanite

2007 ◽  
Vol 63 (4) ◽  
pp. 545-550 ◽  
Author(s):  
Thomas Malcherek
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Transition Metal ◽  
Structural Phase Transition ◽  
Order Parameter ◽  
Diffuse Scattering ◽  
Structural Phase ◽  
Group Symmetry ◽  
Critical Temperatures ◽  
Symmetry Properties

A structural phase transition from space-group symmetry P21/c to C2/c is reported for NaTaOGeO4 (NTGO). The critical temperature has been located at T c = 116 K, based on the appearance of sharp diffraction maxima at positions h + k = 2n + 1 of reciprocal space on cooling below this temperature. Strongly anisotropic diffuse scattering in sheets normal to [001] is observable for T > T c and persists up to ambient temperature. Similarities to phase transitions observed in other compounds of the titanite structure type are discussed. The symmetry properties of these phase transitions are reassessed on the basis of the structural data available. The primary order parameter is identified with the displacement of the transition metal cation M (M = Ta in NTGO) away from the centre of symmetry that it nominally occupies in the paraphase. The order parameter transforms as the Y_{2}^{-} representation. The anisotropic diffuse scattering is attributed to the one-dimensional correlation of local M displacements parallel to the direction of chains of trans-corner-sharing MO6 octahedra. The critical temperatures of the isomorphous phase transitions in various titanite-type compounds depend linearly on the squared transition-metal displacement measured in the ordered P21/c phase.

scholarly journals Structural phase transition, electronic structures and optical properties of ZnTe

2015 ◽  
Vol 64 (22) ◽  
pp. 227802
Author(s):  
Hu Yong-Jin ◽  
Wu Yun-Pei ◽  
Liu Guo-Ying ◽  
Luo Shi-Jun ◽  
He Kai-Hua
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Structural Phase Transition ◽  
Electronic Structures ◽  
Structural Phase
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