Infrared Investigation of the Phase Transition in NaN0_3

概要

論文の詳細を見る
Absorption spectra of a combination mode v_1+v_4 of NaN0_3 single crystal are studied over the temperature range between 26℃ and 29℃ with a polarized infrared radiation. It is found that as temperature rises halfband width markedly broadens as the temperature approaches the transition point of 275℃. The band shape in the high temperature phase is in good agreement with the relative intensity distribution curve calculated on an assumption that the N0_8 ions are rotating freely around the threefold axis. The broadening of the band at any temperature can be explained satisfactorily if the two contours of the band observed at 26℃ and 275℃, respectively, are superposed with an appropriate intensity ratio.
社団法人日本物理学会の論文
1964-04-05