X-Ray Study on the Phase Transition of NaNO_2
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概要
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The precise temperature dependence of X-ray diffraction effects near the transition temperature of ferroelectric NaNO_2 crystal has been examined. The satellite reflections, 1±σ5 0, start to appear at T_8, 0.2℃ below the well-known first-order transition point T_t. Marked asymmetry of the satellite reflections was sometimes observed when a multi-domain crystal was measured. The period of the sinusoidal modulation along the a-axis varies from 10.3 a_0 with increasing temperature. The effect of a d. c. external field along the b-axis on the x-ray diffraction effect was also examined. The experimental evidence indicates the presence of a new phase between T_s and T_t. Some thermodynamical calculations for the phase transition of NaNO_2 were carried out. To explain the intensity asymmetry of the satellite reflections the diffraction effect for a distorted crystal was also calculated.
- 社団法人応用物理学会の論文
- 1967-06-05
著者
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Hoshino Sadao
Institute For Solid State Physics The University Of Tokyo
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Motegi Hiroshi
Institute For Solid State Physics The University Of Tokyo
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Hoshino Sadao
Institute For Solid State Phsics The University Of Tokyo
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