We studied the composition dependence of the structural and magnetic properties of Co-doped Ni-Mn-Ga alloys around the Mn-rich composition Ni(50)Mn(30)Ga(20). 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.
Reverse magnetostructural transformation in Co-doped NiMnGa multifunctional alloys / S., Fabbrici; F., Albertini; A., Paoluzi; F., Bolzoni; R., Cabassi; Solzi, Massimo; Righi, Lara; Calestani, Gianluca. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 95:2(2009), pp. 022508-1-022508-3. [10.1063/1.3179551]
Reverse magnetostructural transformation in Co-doped NiMnGa multifunctional alloys
SOLZI, Massimo;RIGHI, Lara;CALESTANI, Gianluca
2009-01-01
Abstract
We studied the composition dependence of the structural and magnetic properties of Co-doped Ni-Mn-Ga alloys around the Mn-rich composition Ni(50)Mn(30)Ga(20). 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
