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Experimental methods of the magnetocaloric effect studies / Y. I. Spichkin in International journal of refrigeration, Vol. 37 N° 1 (Janvier 2014) 

Public ISBD [article]  in International journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 230-236 Titre : Experimental methods of the magnetocaloric effect studies Titre original : Méthodes expérimentales pour l'étude de l'effet magnétocalorique Type de document : texte imprimé Auteurs : Y. I. Spichkin, Auteur ; R. R. Gimaev, Auteur Année de publication : 2014 Article en page(s) : pp. 230-236 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Magnetocaloric  effect;  magnetic  refrigeration;  measurements;  indirect  methods;  dynamic  magnetocaloric;  direct  methods Résumé : The methods of experimental investigations of the magnetocaloric parameters (adiabatic temperature change and isothermal magnetic entropy change caused by external magnetic field) are reviewed and discussed. The direct and indirect methods are compared and their advantages and disadvantages are considered. Possible influence of the used methods on the obtained results is regarded. The main attention is paid to the direct methods of measurements. The realization of the dynamic mode of the direct adiabatic temperature change measurement is considered. Importance of the magnetocaloric measurements in dynamic mode for characterization of the magnetocaloric materials suitable for using as working bodies in magnetic heat machines is shown. The methods of the experimental data processing are discussed. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002521 [article] Experimental methods of the magnetocaloric effect studies = Méthodes expérimentales pour l'étude de l'effet magnétocalorique [texte imprimé] / Y. I. Spichkin, Auteur ; R. R. Gimaev, Auteur . - 2014 . - pp. 230-236. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 230-236 Mots-clés : Magnetocaloric  effect;  magnetic  refrigeration;  measurements;  indirect  methods;  dynamic  magnetocaloric;  direct  methods Résumé : The methods of experimental investigations of the magnetocaloric parameters (adiabatic temperature change and isothermal magnetic entropy change caused by external magnetic field) are reviewed and discussed. The direct and indirect methods are compared and their advantages and disadvantages are considered. Possible influence of the used methods on the obtained results is regarded. The main attention is paid to the direct methods of measurements. The realization of the dynamic mode of the direct adiabatic temperature change measurement is considered. Importance of the magnetocaloric measurements in dynamic mode for characterization of the magnetocaloric materials suitable for using as working bodies in magnetic heat machines is shown. The methods of the experimental data processing are discussed. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002521

Recent progress in magnetocaloric effect: Mechanisms and potential applications / A. M. Tishin in International journal of refrigeration, Vol. 37 N° 1 (Janvier 2014) 

Public ISBD [article]  in International journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 223–229 Titre : Recent progress in magnetocaloric effect: Mechanisms and potential applications Titre original : Progrès récents dans l'effet magnétocalorique : mécanismes et applications potentielles Type de document : texte imprimé Auteurs : A. M. Tishin, Auteur ; Y. I. Spichkin, Auteur Année de publication : 2014 Article en page(s) : pp. 223–229 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Magnetocaloric  effect;  thermodynamic  model;  magnetic  entropy Résumé : Recent results in understanding of the magnetocaloric effect (MCE) mechanisms in the framework of thermodynamic approach are regarded and discussed. Importance of relation between ΔSMT (magnetic entropy change at constant temperature) and ΔSMH (magnetic entropy change at constant field) and it influence on MCE value is considered. The main contributions to the MCE are discussed. The importance of further development of models of interactions between magnetic and structural subsystems in vicinity of magnetic phase transitions is stressed. It is stated that the present level of MCE parameters (in particular, adiabatic temperature change) can be increased up to 3 times. The necessity of investigation of MCE parameters in dynamic mode and development of new experimental methods and apparatuses for MCE measurements is discussed. The most obvious application for MCE for today is magnetic refrigeration, but MCE also can be used for other applications such as medicine (hyperthermia, drug delivering), etc., which are regarded. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002466 [article] Recent progress in magnetocaloric effect: Mechanisms and potential applications = Progrès récents dans l'effet magnétocalorique : mécanismes et applications potentielles [texte imprimé] / A. M. Tishin, Auteur ; Y. I. Spichkin, Auteur . - 2014 . - pp. 223–229. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 223–229 Mots-clés : Magnetocaloric  effect;  thermodynamic  model;  magnetic  entropy Résumé : Recent results in understanding of the magnetocaloric effect (MCE) mechanisms in the framework of thermodynamic approach are regarded and discussed. Importance of relation between ΔSMT (magnetic entropy change at constant temperature) and ΔSMH (magnetic entropy change at constant field) and it influence on MCE value is considered. The main contributions to the MCE are discussed. The importance of further development of models of interactions between magnetic and structural subsystems in vicinity of magnetic phase transitions is stressed. It is stated that the present level of MCE parameters (in particular, adiabatic temperature change) can be increased up to 3 times. The necessity of investigation of MCE parameters in dynamic mode and development of new experimental methods and apparatuses for MCE measurements is discussed. The most obvious application for MCE for today is magnetic refrigeration, but MCE also can be used for other applications such as medicine (hyperthermia, drug delivering), etc., which are regarded. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002466