We obtained Raman scattermg spectra of normal and deuterated TSCC crystals and one TSCC,\_,B, mived crystal (Cl-x = Cl. Et, = Br). The soft-mode behavlour IS studted m the temperature range from 80 K to the Curie pomt. The Land T component of the soft mode are overdamped near 100 K whale the oblique
13C NMR investigations of the ferroelectric phase transition of tris-sarcosine calcium chloride
β Scribed by D. Michel; F. Engelke
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 400 KB
- Volume
- 96
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
13 C IWR spectra were measured for tris-sarcosine calcium chloride (TSCC) crystals in ths par.xlectric phase (at temperatures of ==300 and 150 K) and in the ferroelectric phase (at temperatures of 119 K) by double-resonance techniques with proton decoupling. The ferrorlastic single crystals were rotated around their three cryst,4lographic axes to dcritc the tensors of magnetic shielding for the different carboxylic carbon atoms. There is no change of the ei~cnwluer and eisenvcctors of the tensors at the phase transition. The results arc consistent with the interpretation of former EPR data.
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H and 13C ENDOR investigations on Mn-doped his-sarcosine calcium chloride (TSCC) and tris-sarcosine calcium bromide (TSCB) at 4.2 K revcal the polar structure of the calcium-(sarcosine)b complex in the ferroelectric phase of TSCC. The sarcosine molecules of type I do not change their position in the
The temperature dependence'of 35C1 pie nuckxu quadrupole resonaxe in tri-u&sine ulciuni chloride wb