Труды сотрудников института физики

/ M. V. Gorev [et al.] // Phys. Solid State. - 2002. - Vol. 44, Is. 2. - P. 353-357, DOI 10.1134/1.1451027. - Cited References: 18 . - ISSN 1063-7834РУБ Physics, Condensed Matter

Аннотация: This paper reports on measurements of the specific heat of Pb2CdWO6 made at temperatures ranging from 80 to 750 K and of Pb2YbTaO6 within the 350- to 700-K temperature range. First-order phase transitions from the cubic phase at 677.3 and 581 K, respectively, were observed, and their thermodynamic characteristics were determined. The entropy change on the phase transitions is close to Rln4 for both compounds. The results obtained are discussed in terms of the model of position disordering of the lead ions. It was established that below 350 K, Pb2CdWO6 can exist in two states, stable and metastable, depending on the sample thermal prehistory. (C) 2002 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
CNRS, CEMEC, F-31055 Toulouse, France
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Sciau, P.

/ I. N. Flerov, M. V. Gorev // Phys. Solid State. - 2001. - Vol. 43, Is. 1. - P. 127-136, DOI 10.1134/1.1340198. - Cited References: 33 . - ISSN 1063-7834РУБ Physics, Condensed Matter

Аннотация: The phase transitions in series of crystals with the general formulas A(2)BB'X-6 (X = F, Cl, Br, or CN) and Pb2BB'O-6 that belong to the elpasolite family (space group Fm(3) over bar m) are analyzed. The influence of the size and the shape of cations and anions on the entropy and the mechanism of structural distortions is discussed. (C) 2001 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Флёров, Игорь Николаевич

/ M. V. Gorev, I. N. Flerov, P. . Sciau // Phys. Solid State. - 2001. - Vol. 43, Is. 2. - P. 345-349, DOI 10.1134/1.1349486. - Cited References: 17 . - ISSN 1063-7834РУБ Physics, Condensed Matter

Аннотация: The heat capacity of Pb2MgTeO6 is measured in the temperature range 80-300 K. It is found that the heat capacity exhibits an anomaly associated with the phase transition at T-0 = 186.9 K. The thermodynamic parameters of the structural transformation are determined. The effect of hydrostatic pressure up to 0.5 GPa on the phase transition temperature is examined. (C) 2001 MAIK "Nauka/Interperiodica".

WOS,
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
CNRS, Ctr Mat Improvement & Struct Invest, F-31055 Toulouse, France
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
CNRS Ctr. for Mat. I., Tuluza, 31055, France

Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Sciau, P.; Горев, Михаил Васильевич