Tuning magnetic exchange interactions to enhance magnetocaloric effect in Ni50Mn34In16 Heusler alloy: Monte Carlo and ab initio studies / V. V. Sokolovskiy in International journal of refrigeration, Vol. 37 N° 1 (Janvier 2014)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 273–280 Titre : Tuning magnetic exchange interactions to enhance magnetocaloric effect in Ni50Mn34In16 Heusler alloy: Monte Carlo and ab initio studies Titre original : Réglage des interactions d'échange magnétique pour améliorer l'effet magnétocalorique dans l'alliage de Heusler NI50Mn34In16 : études de Monte Carlo et initiales Type de document : texte imprimé Auteurs : V. V. Sokolovskiy, Auteur ; V. D. Buchelnikov, Auteur ; V. V. Khovaylo, Auteur Année de publication : 2014 Article en page(s) : pp. 273–280 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Heulser alloys  magnetocaloric effect  ferromagnetic – antiferromagnetic interaction  Monte Carlo method Résumé : Influence of the strength of magnetic exchange interactions and impact of a ferromagnetic-antiferromagnetic exchange competition on magnetocaloric effect in a Ni50Mn34In16 Heusler alloy are studied by a Monte Carlo simulation. Temperature dependencies of magnetic and magnetocaloric properties are obtained in the framework of Potts and Blume-Emery-Griffiths models. It is shown that a decrease of the exchange interactions as well as “switching off” ferromagnetic interactions between the Mn atoms in the martensite favors the inverse magnetocaloric effect in Ni50Mn34In16. Contrary, “switching off” antiferromagnetic interactions depletes the inverse magnetocaloric effect. It is supposed that the exchange interactions in Ni–Mn-In alloys can be tuned favorably by a doping of the host alloys with nonmagnetic or antiferromagnetic atoms, e.g., B, Cu, Cr, etc. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001448 [article] Tuning magnetic exchange interactions to enhance magnetocaloric effect in Ni50Mn34In16 Heusler alloy: Monte Carlo and ab initio studies = Réglage des interactions d'échange magnétique pour améliorer l'effet magnétocalorique dans l'alliage de Heusler NI50Mn34In16 : études de Monte Carlo et initiales [texte imprimé] / V. V. Sokolovskiy, Auteur ; V. D. Buchelnikov, Auteur ; V. V. Khovaylo, Auteur . - 2014 . - pp. 273–280. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 37 N° 1 (Janvier 2014) . - pp. 273–280 Mots-clés : Heulser alloys  magnetocaloric effect  ferromagnetic – antiferromagnetic interaction  Monte Carlo method Résumé : Influence of the strength of magnetic exchange interactions and impact of a ferromagnetic-antiferromagnetic exchange competition on magnetocaloric effect in a Ni50Mn34In16 Heusler alloy are studied by a Monte Carlo simulation. Temperature dependencies of magnetic and magnetocaloric properties are obtained in the framework of Potts and Blume-Emery-Griffiths models. It is shown that a decrease of the exchange interactions as well as “switching off” ferromagnetic interactions between the Mn atoms in the martensite favors the inverse magnetocaloric effect in Ni50Mn34In16. Contrary, “switching off” antiferromagnetic interactions depletes the inverse magnetocaloric effect. It is supposed that the exchange interactions in Ni–Mn-In alloys can be tuned favorably by a doping of the host alloys with nonmagnetic or antiferromagnetic atoms, e.g., B, Cu, Cr, etc. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001448

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