| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1800435 | Journal of Magnetism and Magnetic Materials | 2011 | 5 Pages |
The structural and magnetic transitions in Ni48Co2Mn39Sn11 shape memory alloy were systematically investigated. During cooling, the paramagnetic austenite transforms into paramagnetic martensite at TM∼375 K, followed by a gradual transition from paramagnetic to superparamagnetic martensite around TS∼320 K. Upon further cooling through TP∼100 K, the superparamagnetic clusters collectively freeze into a superspin glass state as corroborated by aging, rejuvenation, and memory effects. Consequently, the unique transition sequence of paramagnetic austenite→paramagnetic martensite→superparamagnetic martensite→superspin-glass martensite is disclosed.
► We studied the structural and magnetic transitions in the Ni48Co2Mn39Sn11 alloy. ► Paramagnetic austenite transforms into paramagnetic martensite at TM∼375 K. ► A gradual transition from paramagnetic to superparamagnetic martensite is followed. ► Superparamagnetic clusters further freeze into superspin glass state at ∼100 K. ► Finally, the unique transition sequence of this alloy is disclosed.
