Electrodeposited Heusler Alloys-Based Nanowires for Shape Memory and Magnetocaloric Applications.

In this article, the downsizing of functional Heusler alloys is discussed, focusing on the published results dealing with Heusler alloy nanowires. The theoretical information inspired the fabrication of novel nanowires that are presented in the results section of the article. Three novel nanowires were fabricated with the compositions of Ni 66 Fe 21 Ga 13 , Ni 58 Fe 28 In 14 , and Ni 50 Fe 31 Sn 19 . The Ni 66 Fe 21 Ga 13 nanowires were fabricated, aiming to improve the stoichiometry of previous functional Ni-Fe-Ga Heusler nanomaterials with a functional behavior above room temperature. They exhibit a phase transition at the temperature of ≈375 K, which results in a magnetocaloric response of |Δ S M | ≈ 0.12 J·kg -1 ·K -1 at the magnetic field change of only μ 0 Δ H = 1 T. Novel Heusler alloy Ni 58 Fe 28 In 14 nanowires, as well as Ni 50 Fe 31 Sn 19 nanowires, are analyzed for the first time, and their magnetic properties are discussed, introducing a simple electrochemical approach for the fabrication of nanodimensional alloys from mutually immiscible metals.