  Heusler ferromagnetic shape-memory alloys (FSMAs) normally consist of
transition-group d-metals and main-group p-elements. Here, we report the
realization of FSMAs in Heusler phases that completely consist of d metals. By
introducing the d-metal Ti into NiMn alloys, cubic B2-type Heusler phase is
obtained and the martensitic transformation temperature is decreased
efficiently. Strong ferromagnetism is established by further doping Co atoms
into the B2-type antiferromagnetic Ni-Mn-Ti austenite. Based on the
magnetic-field-induced martensitic transformations, collective multifunctional
properties are observed in Ni(Co)-Mn-Ti alloys. The d metals not only
facilitate the formation of B2-type Heusler phases, but also establish strong
ferromagnetic coupling and offer the possibility to tune the martensitic
transformation.
