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HEAT-CAPACITY MEASUREMENT OF THE SUCCESSIVE PHASE-TRANSITIONS IN CS2ZNI4 / J. J. MELERO [et al.]> // Solid State Commun. - 1995. - Vol. 95, Is. 4. - P. 201-206, DOI 10.1016/0038-1098(95)00261-8. - Cited References: 20
. - ISSN 0038-1098РУБ Physics, Condensed Matter Рубрики: INCOMMENSURATE PHASE SEQUENCE CRYSTALS CS2CDI4 Кл.слова (ненормированные): FERROELECTRICS -- HEAT CAPACITY -- PHASE TRANSITIONS -- INCOMMENSURATE PHASES Аннотация: The heat capacity of a Cs2ZnI4 single crystal has been measured by means of AC calorimetry. Three anomalies have been detected corresponding to a normal to inconmensurate phase transition at T-I = 116.9+/-0.1 K, an incommensurate to commensurate lock-in transition at T-L = 107.58+/-0.05 K, and a structural transition from a commensurate orthorhombic to a monoclinic phase at T-C = 93.77+/-0.05 K with thermal hysteresis. The lock-in transition has the peculiarity of being discontinuous but not showing any measurable hysteresis. After comparison with the Landau model predictions for the heat capacity, derived for the k(Delta) = (1/2 + Delta)a* case, it is concluded that Cs2ZnI4 lies close to the Lifschitz point of coexistence of the normal, incommensurate and commensurate phases.
WOS, Scopus Держатели документа: RUSSIAN ACAD SCI,LV KIRENSKY PHYS INST,SIBERIAN BRANCH,KRASNOYARSK 660036,RUSSIA Instituto de Ciencia de Materiales de Aragon. C.S.I.C. - Universidad de Zaragoza, 50009 Zaragoza. Spain. ИФ СО РАН Доп.точки доступа: MELERO, J. J.; BARTOLOME, J.; BURRIEL, R.; ALEKSANDROVA, I. P.; Александрова, Инга Петровна; PRIMAK, S. } Найти похожие
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