Thermal Expansion in Na(H_<1-x>D_x)_3(SeO_3)_2 and Isotope Effect
スポンサーリンク
概要
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Linear thermal expansions along crystallographic axes for NaH_3(SeO_3)_2 and NaD_3(SeO_3)_2, and those along the b axis for the Na(H_<1-x>D_x)_3(SeO_3)_2 system in the entire range of x were measured in their transition temperature regions. It is found that the replacement of hydrogen by deuterium shows a large isotope effect in saturated spontaneous strains in the [010] plane, but no isotope effect along the [010] direction. Linear thermal expansions for the crystals of the Na(H_<1-x>D_x)_3(SeO_3)_2 system in the range 0<x<0.4 show rather complicated behavior due to the existence of three phase transitions. The phase diagram of this system shows unusual isotope effect in the transition temperatures. Present results suggest that there are strong couplings between protons (or deuteron) and lattices of Na^+ and SeO_3^<--> ions in NaH_3(SeO_3)_2 (or NaD_3(SeO_3)_2).
- 社団法人日本物理学会の論文
- 1970-07-05
著者
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Makita Yasuharu
Faculty Of Science Hokkaido University
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MIKI Hirohumi
Faculty of Science, Scinece University of Tokyo
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Miki Hirohumi
Faculty Of Science Science University Of Tokyo
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