Angular and Temperature Dependences of the ^<75>As NMR Linewidth in Ferroelectric KH_2AsO_4 near the Phase Trantition Temperature
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概要
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Precise angular and temperature dependences of NMR 1/2⟷-1/2 linewidth of the ^<75>As in KH_2AsO_4 have been investigated in the para-electric phase for both the a and c-axes rotations. The temperature of sample was regulated within ∼0.1℃ near the phase transition temperature as well as in time and space. The angular and temperature dependences of an anomalous broadening are well explained by the adiabatic broadening calculated on the basis of an order-disorder model. It is shown that the anomalous broadening depends on temperature as log(T-T_c) if the depolarization field owing to the long range dipole-dipole interaction is taken into account. This temperature dependence is in accord with the experimental result from about -100℃ to 2∼3℃ above T_c.
- 社団法人日本物理学会の論文
- 1975-08-15
著者
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TATSUZAKI Itaru
Research Institute of Applied Electricity,Hokkaido University
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TAKOSHIMA Takehiro
Research Institute of Applied Electricity, Hokkaido University
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Takoshima Takehiro
Research Institute Of Applied Electricity Hokkaido University
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Tatsuzaki Itaru
Research Institute Of Applied Electricity Hokkaido University
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