Structure And Magnetic Properties Of Pulsed Electrodeposited Nickel-Indium Alloy

A nickel-indium (Ni-In) ferromagnetic alloy is successfully synthesized through a facile pulsed electrodeposition method. The composition, structure, and morphology are analyzed through atomic absorption spectroscopy (AAS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and electron microscopy. The composition and structural analysis indicate fcc phase for the Ni43In57 and Ni63In37 alloys. The Ni-In alloy shows mixed phases when the Ni content is increased from 63 to 66 at%. Thermal analysis of the Ni63In37 results in an activation energy of 46 and 557 kJ mol(-1) that can arise from the grain growth phenomena and phase transformation, respectively. Thermomagnetic studies show a Curie temperature of 340 degrees C for the Ni-In alloy with 63 at% Ni that also exhibits a saturation magnetization of 36 emu g(-1).