Theory of Neutron Scattering from Lattice Vibratons. II. : Application of a Phonon Theory

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概要

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• A phonon theory developed previously which is a new approach besides the self consistent phonon theory and which is generalization of the Born phonon theory giving the rigorous phonon frequencies and normal coordinates of a crystal at an arbitrary temperature, is applied to neutron scattering from lattice vibrations in an anharmonic crystal. This application is done using a moment expansion of the canonical correlation function in the form of a continued fraction. A displacive ferroelectric and a perovskite crystal which exhibits a structural phase transition are discussed in some detail. A magnetic system having the spin-phonon interaction due to modulation of the exchange interaction caused by lattice vibrations is also discussed. A scattering cross section which depends explicitly upon the interaction acting on a phonon and has an anomalous temperature dependence near the transition point is found in some cases.

• 社団法人日本物理学会の論文
• 1974-02-15

著者

• Tani Kensuke

  Department Of Chemistry Faculty Of Science Kyoto University

関連論文

• Theory of Resistance Minimum in Dilute Paramagnetic Alloys
• Ultrasonic Attenuation in Magnetics at Low Temperatures
• Dynamical Behaviors of Antiferromagnetic Spins
• Dynamical Behaviour of Displacive-Type Ferroelectrics near the Transition Point
• 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
• Theory of Neutron Scattering from Lattice Vibrations

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