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Issue J. Phys. Colloques
Volume 33, Number C2, Avril 1972
2e CONGRÈS EUROPÉEN DE FERROÉLECTRICITÉ
Page(s) C2-91 - C2-92
DOI http://dx.doi.org/10.1051/jphyscol:1972227

2e CONGRÈS EUROPÉEN DE FERROÉLECTRICITÉ

J. Phys. Colloques 33 (1972) C2-91-C2-92
DOI: 10.1051/jphyscol:1972227

STRUCTURE OF DEUTERATED KDP CRYSTAL : DEUTERIUM CONCENTRATION DETERMINATION

B. J. ISHERWOOD and J. A. JAMES

(The General Electric Company Limited, Central Research Laboratories, Hirst Research Centre, Wembley, England)


Résumé
Nous avons effectué les mesures des paramètres de la maille élémentaire et de la température de transition Tc de plusieurs cristaux de phosphate de potassium deutérés avec un pourcentage c variable de deutérium 76-96 %. Il a été démontré que le paramètre ao (mesuré à 22 °C) et Tc ont une variation linéaire en fonction de la concentration en deutérium. Ces relations sont les suivantes : Tc = 123 + 106 x, °K ao = 7,452 39 + 1,759 x 10-2 x, Å où x = D/(D + H).


Abstract
Measurements of the structure-cell parameters and ferroelectric Curie temperature, Tc, of a number of tetragonal potassium dideuterium phosphate crystals, with deuterium contents covering range 76-96 %, have been conducted. It has been demonstrated that both the ao structurecell parameter (measured at 22 °C) and Tc exhibit a linear dependence with deuterium content. The relationship between these parameters being established as, Tc = 123 + 106 x, °K ao = 7.452 39 + 1.759 x 10-2 x, Å where x = D/(D + H).





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