The Magnetocaloric Effect and Heat Capacity of Suspensions of High-Dispersity Samarium Ferrite

Autor:	I. M. Aref’ev, V. V. Korolev, A. G. Ramazanova
Rok vydání:	2008
Předmět:	Materials science Condensed matter physics Enthalpy chemistry.chemical_element Thermodynamics Atmospheric temperature range Heat capacity Magnetic field Samarium Paramagnetism chemistry Magnetic refrigeration Curie temperature Physical and Theoretical Chemistry
Zdroj:	Russian Journal of Physical Chemistry. 82:245-248
ISSN:	1531-863X 0036-0244
Popis:	The magnetocaloric effect and specific heat capacity of an aqueous suspension of samarium ferrite were determined calorimetrically over the temperature range 288–343 K in magnetic fields of 0–0.7 T. The data obtained were used to calculate changes in the magnetic component of the molar heat capacity and entropy of the magnetic phase and changes in the enthalpy of the process under an applied magnetic field. The magnetocaloric effect was found to increase nonlinearly as the magnetic field induction grew. The corresponding temperature dependences contained a maximum at 313 K related to the second-order magnetic phase transition at the Curie point. The field and temperature dependences of heat capacity contained a maximum in fields of 0.4 T and a minimum at the magnetic phase transition temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9cc810f7aef73c77eadce6c9ce25c4ea https://doi.org/10.1134/s0036024408020192 Zobrazit plný text záznamu Full text from SpringerLink