论文信息 - Incommensurate Phase in γ-Irradiated RbH3(SeO3)2 and RbD3(SeO3)2

Incommensurate Phase in γ-Irradiated RbH3(SeO3)2 and RbD3(SeO3)2

ESR spectra and dielectric constant of γ-irradiated RbH 3 (SeO 3 ) 2 and RbD 3 (SeO 3 ) 2 were measured simultaneously around the phase transition temperature ( T C ). It has been confirmed that in these substances with the doze of about 5 Mard, an incommensurate phase appears in the temperature range of about 4 ∼6 K above T C and the range broadens slightly with the increase of doze. From the analysis of temperature dependence of A tensor for SeO 2 - radical, it is clarified that SeO 3 (II) in RbD 3 (SeO 3 ) 2 rotates in a quite similar way with that in RbH 3 (SeO 3 ) 2 below T C . It was found for the first time that in RbD 3 (SeO 3 ) 2 the dielectric constant peak along the a -axis at T C is much larger than that along the b -axis. On these results some discussion is presented.

M. Fukui | T. Yagi | R. Abe | Kenshiro Yamamoto | A. Sakai

[1] R. Blinc,et al. 87Rb and 85Rb NQR study of phase transitions in RbH 3(SeO3)2 , 1983 .

[2] R. Blinc,et al. Rb87NMR study of the incommensurate phase in RbD3(SeO3)2 , 1982 .

[3] M. Fukui,et al. ESR Study of RbH_3(SeO_3)_2 Crystals Doped with Cr^ Ions , 1982 .

[4] Gotō Yoshihiro,et al. Phase Transition in Ferroelectric RbH3(SeO3)2 , 1980 .

[5] Y. Makita,et al. Ultrasonic Velocity and Absorption in RbH 3 (SeO 3 ) 2 near the Curie Temperature , 1980 .

[6] M. Sumita,et al. Dielectric Relaxation of Ferroelectric RbH 3 (SeO 3 ) 2 near the Curie Temperature , 1980 .

[7] M. Iizumi,et al. Study on the Incommensurate Nature of the Intermediate Phase of RbD3(SeO3)2 by Neutron Diffraction , 1980 .

[8] I. Tatsuzaki,et al. Deuteron Magnetic Resonance in RbD3(SeO3)2 , 1979 .

[9] I. Tatsuzaki,et al. 87Rb NMR in Ferroelectric RbH3(SeO3)2 , 1979 .

[10] H. Grimm,et al. A neutron investigation of the low-temperature structure of RbH3(SeO3)2 , 1978 .

[11] H. Grimm,et al. On the order parameter of RbH3(SeO3)2 , 1977 .

[12] L. Shuvalov,et al. Spontaneous polarization in the RbD3 (SeO3)2 crystal , 1976 .

[13] G. Gounaris,et al. Scaling violation in electroproduction at large ω , 1975 .

[14] R. Tellgren,et al. Hydrogen bond studies: 67.∗ The crystal structure of rubidium trihydrogen selenite, RbH3(SeO3)2 , 1973 .

[15] D. Whiffen,et al. Electron spin resonance of the SeO2 - radical ion , 1964 .