Critical Behavior of K_<1-x>Li_xTaO_3 with the Tri-Critical Concentration of Li under an Electric Field(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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Temperature dependences of the optical second harmonic generation in Li-doped KTaO_3 (KLT) with different Li concentrations x are measured to determine the coefficients in the Landau-Devonshire free energy function. The result specifies the tri-critical Li concentration x_c. Temperature dependences of the dielectric constant of KLT with Li concentrations nearly located at x_c are also measured under dc bias fields and the result suggests that these compounds lie in close vicinity of the line of critical end points. The tertiary phase diagram (T,x,E) of KLT is disclosed from the experiments.
- 社団法人日本物理学会の論文
- 2008-02-15
著者
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UESU Yoshiaki
Department of Physics, Waseda University
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Yokota Hiroko
Department of Cardiology, Kyoto National Hospital
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Uesu Yoshiaki
Depart. Phys. Waseda Univ.
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Yokota Hiroko
Department Of Physics Waseda University
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Yokota Hiroko
Department Of Anatomy Faculty Of Medicine Kyoto University
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