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首页> 外文期刊>Phase Transitions >(X, T)-phase diagram of TlIn(S1-xSex)(2)solid solutions (x =0, 0.02, 0.06, 0.10, 0.15 and 0.25). Temperature dependences of thermal expansion and optical anisotropy parameters
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(X, T)-phase diagram of TlIn(S1-xSex)(2)solid solutions (x =0, 0.02, 0.06, 0.10, 0.15 and 0.25). Temperature dependences of thermal expansion and optical anisotropy parameters

机译:(x,t)-phase图tlin(s1-xsex)(2)固溶液(x = 0,0.02,0.06,0.10,0.15和0.25)。 热膨胀和光学各向异性参数的温度依赖性

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摘要

Basing on dilatometric and optical anisotropy studies, we have obtained (x, T)-phase diagram for TlIn(S1-xSex)(2)solid solutions in the range 0 <= x <=( )0.25 of selenium concentrations. It has been found that increasing selenium concentration leads to decrease in almost all of phase transition (PT) temperatures. At the same time, the temperatureT(i)of PT into incommensurate phase for the polytypec = c(0)increases at the selenium concentrations higher than 0.1, and we observe a tendency to broadening of the temperature region where the incommensurate phase exists. The incommensurate-ferroelectric PT reveals a notably diffuse character. We have also demonstrated that the TlIn(S1-xSex)(2)solid solutions have a polytype structure. It manifests itself in availability of additional PT in the solid solutions with 0 <= x <=( )0.05. Most probably, the latter corresponds to ferroelectric transformation in the polytype withc = 16c(0).
机译:基于膨胀和光学各向异性研究,我们已经获得(S1-XSEx)(2)固溶体的(X,T)-Phase图在0 <= x <=()0.25的硒浓度的范围内。 已经发现,增加硒浓度导致几乎所有相变(Pt)温度降低。 同时,Pt的温度(I)纳入到COMENSUREDATE的相对于COYTYPEC = C(0)的相位高于0.1的溶酶浓度增加,并且我们观察到展会不加态相存在的温度区域的趋势。 联素 - 铁电Pt揭示了显着的漫射特征。 我们还证明了Tlin(S1-XSex)(2)固溶体具有多型结构。 它在固体溶液中表现出额外的PT,0 <= x <=()0.05。 最重要的是,后者对应于PolyType的铁电变换= 16c(0)。

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