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Thermal expansion, phase diagrams and barocaloric effects in (NH4)(2)NbOF5 / M. . Gorev [et al.]> // J. Phys.: Condens. Matter. - 2010. - Vol. 22, Is. 18. - Ст. 185901, DOI 10.1088/0953-8984/22/18/185901. - Cited References: 17. - This work was supported in part by the Krasnoyarsk Regional Foundation for Support of Scientific and Scientific-Technological Investigations and RFBR in the framework of project 'Siberia' (Grant No. 09-02-98001), and the Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools (project No. Nsh-1011.2008.2).
. - ISSN 0953-8984РУБ Physics, Condensed Matter Рубрики: CRYSTAL-STRUCTURE SOLID-STATE OXYFLUORIDE TRANSITION ANION Кл.слова (ненормированные): Antiferromagnets -- Ferromagnets -- Heat capacities -- High stress -- Intermediate phase -- Pippard relations -- Structural phase transition -- Transition temperature -- Uniaxial pressures -- Financial data processing -- Phase diagrams -- Phase transitions -- Thermal stress -- Tools -- Thermal expansion Аннотация: The thermal expansion along the a, b and c axes of a (NH4)(2)NbOF5 crystal was measured from 120 to 300 K. Anomalies of alpha(T) associated with previously reported phase transitions Cmc2(1) -> C-2 -> I a were observed along all directions at T-1 = 259.3 K and T-2 = 220.5 K. The analysis of thermal expansion and heat capacity in the frame of the Pippard relations has permitted us to determine the uniaxial pressure derivatives of the transition temperatures dT/d sigma(i). The T-sigma(i) phase diagrams have shown a tendency for the intermediate phase to disappear at high stress along the b and c axes. Intensive and extensive barocaloric effects near the structural phase transitions were found to be comparable with the caloric parameters of some ferroelectrics, ferromagnets and antiferromagnets.
WOS, Scopus, Читать в сети ИФ Держатели документа: [Gorev, Michail Bogdanov, Evgeny Flerov, Igor] Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia [Gorev, Michail Flerov, Igor] Siberian Fed Univ, Inst Engn Phys, Krasnoyarsk 660041, Russia [Laptash, Nataly] Russian Acad Sci, Far Eastern Div, Inst Chem, Vladivostok 690022, Russia ИФ СО РАН LVKirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Akademgorodok 660036, Russian Federation Institute of Engineering Physics, Siberian Federal University, av. Svobodny 79, Krasnoyarsk 660041, Russian Federation Institute of Chemistry, Far Eastern Division, Russian Academy of Sciences, Vladivostok 690022, Russian Federation Доп.точки доступа: Gorev, M.; Bogdanov, E. V.; Богданов, Евгений Витальевич; Flerov, I. N.; Флёров, Игорь Николаевич; Laptash, N. M. } Найти похожие
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