Introduction to Solid State Physics |
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Page 117
... BARIUM TITANATE We consider first the general order of magnitude of the ferroelectric effects in barium titanate : It is observed that barium titanate has at room temperature a saturation polarization of 48,000 esu . As the volume of a ...
... BARIUM TITANATE We consider first the general order of magnitude of the ferroelectric effects in barium titanate : It is observed that barium titanate has at room temperature a saturation polarization of 48,000 esu . As the volume of a ...
Page 121
... barium titanate vs. temperature . [ After B. Wul , J. Phys . ( U.S.S.R. ) 10 , 95 ( 1946 ) ; it is not known why Wul's Curie point is 40 ° below that reported by other workers . ] have , from ... barium titanate THEORY OF BARIUM TITANATE 121.
... barium titanate vs. temperature . [ After B. Wul , J. Phys . ( U.S.S.R. ) 10 , 95 ( 1946 ) ; it is not known why Wul's Curie point is 40 ° below that reported by other workers . ] have , from ... barium titanate THEORY OF BARIUM TITANATE 121.
Page 122
... barium titanate is 2.4 ; we estimate the elec- tronic contribution to the polarizabilities from the relation ( 7.9 ) n2 1 n2 + 2 = 4π 3 Σ Nia ; ( electronic ) , = = 1.95 X 10-24 cc ; = according to ( 6.11 ) . Using Slater's values a ...
... barium titanate is 2.4 ; we estimate the elec- tronic contribution to the polarizabilities from the relation ( 7.9 ) n2 1 n2 + 2 = 4π 3 Σ Nia ; ( electronic ) , = = 1.95 X 10-24 cc ; = according to ( 6.11 ) . Using Slater's values a ...
Contents
LATTICE ENERGY OF IONIC CRYSTALS | 29 |
ELASTIC CONSTANTS OF CRYSTALS | 43 |
LATTICE VIBRATIONS | 60 |
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absorption alkali alloy anisotropy antiferromagnetic approximately atoms axes axis Bardeen barium titanate boundary calculated charge coefficient conduction band cube Curie point Debye density diamagnetic dielectric constant diffraction diffusion dipole direction discussed dislocation displacement domains effect elastic electric field energy entropy equation equilibrium experimental F-centers factor Fermi ferroelectric ferromagnetic free electron frequency given heat capacity holes impurity interaction ionic crystals ionized ions lattice constant lattice points London low temperatures magnetic field magnetic moment metals molecules motion nearest neighbor normal observed optical orbital parallel paramagnetic particles perovskite phonons Phys physical plane polarizability polarization positive potassium potassium chloride potential Proc quantum resonance result room temperature scattering Seitz shear Shockley shown in Fig single crystal sodium chloride solids specimen spin strain stress superconducting surface susceptibility symmetry Table theory thermal tion transition unit volume vacancy valence values vector velocity wave functions x-ray zero