Theory of the First Order Phase Transition in BaTiO_3
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概要
- 論文の詳細を見る
The ferroelectric-)caraelectric pltase transition irt Basic.. is discussed quantitativelyfrom the microscopic free energy based L1p0r1 tlte statistical method of the mean fieldapproximation, wltere only the Ti ions situated at the center of tlte lattice are assumedto have the spontaneous sltift. It is show'mv that the restult of the "fin-st order" phasetransition is obtained if the efl'ect of the spontamteous lattice deforxnatioxt is takemt intoaccount in a pu-oper way whemt making the potential ;tetixtg out the Ti ions. Moreover itis shown that tltis microscopic free energy can be tr;tnslated to tlte macroscopic I'reeenergy based upon the phenomenological theory. Tltrough the counparison betweemtthese two types of free energies it is possible to uxtclcrstand better the mechanism oi'the ferroelectric-paraelectric phase transition.[ftransition, ll meanI" I'ree l[ energylerroelectric-paraelectric phase transition in BaTi0., first order pltasefield approxumation, spontaneous lattice clcl'orntatuon, I11lCI0SC0p1C
- 社団法人日本物理学会の論文
- 1992-06-15
著者
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Nakamura Kenro
Department Of Physics School Of Science And Engineering Waseda University
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Kinase Wataru
Deparment Of Physics Wasea University
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Nakamura Kenro
Department of Physics,School of Science and Engineering, Waseda University
-
Kinase Wataru
Department of Physics,School of Science and Engineering, Waseda University
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