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This work presents the preparation and characterisation of the multifunctional Ni 2 NbSn Heusler alloy. The alloy was prepared using arc melting in the form of an ingot showing an L2 1 Heusler structure. The resistance measurements confirmed the superconductive character of the Ni 2 NbSn alloy with the critical temperature of T SC = 3.00 K and the upper critical magnetic field of μ 0 H SC = 0.69 T. Magnetic measurements confirmed strong diamagnetic contribution arising from the superconducting state and the additional ferromagnetic contribution observable below 13 K. The coexistence of superconductivity and ferromagnetism in Ni 2 NbSn Heusler alloy may give rise to new applications based on magnetic shielding or electromagnetic invisibility. • Production of Ni 2 NbSn Heusler alloy. • Superconductivity observed below the temperature of 3.00 K. • Ferromagnetic contribution observed below the Curie temperature T FM = 13 K. • Coexistence of both physical properties in the Heusler phase is presented. [ABSTRACT FROM AUTHOR]

Wire‐shaped materials are ideal form for rapid, cheap, and scalable production and application. Herein, the most recent results on Heusler‐based cylindrical micro‐ and nanowires are reviewed, emphasizing spintronic, magnetocaloric, and shape memory applications. Herein, how the Heusler alloy's composition can be tuned to achieve a material with repeatable magnetic and mechanical properties is showed. A wide range of possible Heusler compositions allows us to tune the structural transformation temperatures by alloying the original composition with a few percent of metalloid. Wire shape brings additional effect—well‐defined easy axis change due to a structural transformation that enhances the magnetocaloric effect at low‐magnetic fields. The unique wire's shape properties can be downscaled to nanoscale range by electrodeposition. It is showed that such a method allows the production of a highly ordered array of nanowires. As a result, the magnetocaloric effect of an array of nanowires can be one order higher than that obtained by other production methods, where the nanowires are oriented randomly. Finally, some possible applications of shape memory or magnetocaloric actuators and the possibility of implementing high spin polarization for the construction of spintronic devices are showed. [ABSTRACT FROM AUTHOR]