Dynamical Behaviour of Displacive-Type Ferroelectrics near the Transition Point

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概要

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• Dynamical behaviour of both optical and acoustic modes near the transition point of displacive-type ferroelectrics such as BaTiO_3 and SrTiO_3 is investigated theoretically with the use of the correlation function method. Particular attention is paid to the behaviour concerning the memory effect due to the critical fluctuation of polarizations and the possibility of existence of a new-type oscillation peculiar to the critical regime is shown adopting the Silverman Hamiltonian. The dynamic scaling law in the original form is shown not to be applicable to these substances and its physical origin is clarified. An extended form of this law is given.

• 社団法人日本物理学会の論文
• 1971-02-05

著者

• Tani Kensuke

  Department Of Physics Faculty Of Science Osaka University:(present)research Institute For Fundamenta

• Tani Kensuke

  Department Of Chemistry Kyoto University:theoretical Physics Division A.e.r.e.

• Tani Kensuke

  Department Of Chemistry Faculty Of Science Kyoto University

• Takemura Makoto

  Department Of Chemistry Kyoto University

• Takemura Makoto

  Department Of Chemistry Graduate School Of Science Osaka City University

• TAKEMURA Makoto

  Department of Chemistry, Kyoto University

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• Dynamical Behaviors of Antiferromagnetic Spins
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• Thermal Conductivity of SrTiO_3, KTaO_3 and BaTiO_3 near the Curie Points
• Frequency Shift and Damping Constant of Spin Waves in a Heisenberg Ferrimagnet with Uniaxial Anisotropy
• Longitudinal Spin Pair Correlation in Ferro- and Antiferromagnets with Uniaxial Anisotropy
• Theory of Neutron Scattering from Lattice Vibratons. II. : Application of a Phonon Theory
• Dynamics of Displacive-Type Ferroelectrics : Soft Modes
• Ultrasonic Attenuation near the Magnetic Critical Point
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