Istituto dei materiali per l'elettronica ed il magnetismo     
Albertini F., Canepa F., Cirafici S., Franceschi E., Napoletano M., Paoluzi A., Pareti L., Solzi M. Composition dependence of magnetic and magnetothermal properties of Ni-Mn-Ga shape memory alloys. In: Journal of Magnetism and Magnetic Materials, vol. 272-276 pp. 2111 - 2112. Proceedings of the International Conference on Magnetism (ICM 2003). Elsevier, 2004.
A simultaneous magnetic and structural transition is found for Ni2 + xMn1-xGa at 0.18less than or equal toxless than or equal to0.2. The existence of a composition range for observing the co-occurrent transition and the composition dependence of the critical temperatures are discussed in the light of the expected difference between the Curie temperatures of the austenitic and martensitic phases. A giant magnetic entropy change is deduced for the three samples, with a maximum value of the order of DeltaS(m) = 15 J/kg K for a field span of 1.8 T.
URL: http://www.sciencedirect.com/science/article/pii/S0304885303017967
DOI: 10.1016/j.jmmm.2003.12.883
Subject Ferromagnetic-shape-memory alloy
Magnetocaloric effect

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