Istituto dei materiali per l'elettronica ed il magnetismo     
Fabbrici S., Albertini F., Paoluzi A., Bolzoni F., Cabassi R., Solzi M., Righi L., Calestani G. Reverse magnetostructural transformation in Co-doped NiMnGa multifunctional alloys. In: Applied Physics Letters, vol. 95 (2) article n. 022508. American Institute of Physics, 2009.
We studied the composition dependence of the structural and magnetic properties of Co-doped Ni-Mn-Ga alloys around the Mn-rich composition Ni50Mn30Ga20. By varying the Co and Mn content we have been able to tune the critical temperatures. In particular, in a suitable composition range, the Curie temperature of martensite is lower than Curie temperature of austenite and lower than martensitic transformation temperature, giving rise to a paramagnetic gap between magnetically ordered martensite and austenite and to the occurrence of a reverse magnetostructural transformation.
URL: http://apl.aip.org/applab/v95/i2/p022508_s1?isAuthorized=yes
DOI: 10.1063/1.3179551
Subject 75.30.Kz

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