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Gorev, Mikhail V
Bogdanov, Evgeniy V
Flerov, Igor N
2018-02-07T07:32:04Z
2018-02-07T07:32:04Z
2017-08
Gorev, Mikhail V. T − p phase diagrams and barocaloric effect in materials with successive phase transitions [Текст] / Mikhail V Gorev, Evgeniy V Bogdanov, Igor N Flerov // Journal of Physics D: Applied Physics. — 2017. — Т. 50 (№ 38). — С. 384002 (10pp)
00223727
http://iopscience.iop.org/article/10.1088/1361-6463/aa8025
http://elib.sfu-kras.ru/handle/2311/70090
Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.
Abstract An analysis of the extensive and intensive barocaloric effect (BCE) at the successive structural phase transitions in some complex fluorides and oxyfluorides was performed. A high sensitivity of these compounds to a change of the chemical pressure allows one to vary successions and parameters of the transformations (temperature, entropy, baric coefficient) in wide ranges and obtain the optimal values of BCE. A comparison of different types of the schematic T − p phase diagrams with the complicated T(p) dependences observed experimentally shows that in some ranges of temperature and pressure BCE in compounds undergoing successive transformations can be increased due to summation of caloric effects associated with the distinct phase transitions. The maximum values of the extensive and intensive BCE in complex fluorides and oxyfluorides can be realized at rather low pressure, 0.1 – 0.3 GPa. In narrow temperature range around triple points the conversion from the conventional BCE to the inverse one is observed which is followed by gigantic change of both |∆SBCE| and |∆TAD|.
barocaloric effect
phase transition
phase diagram
entropy
T − p phase diagrams and barocaloric effect in materials with successive phase transitions
Journal Article
Journal Article Preprint
384002 (10pp)
29.19.09
2018-02-07T07:32:04Z
10.1088/1361-6463/aa8025
Институт инженерной физики и радиоэлектроники
Кафедра теплофизики
Journal of Physics D: Applied Physics
Q1
Q2


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