Effect of interface NiO layer on magnetism in Fe/BaTiO₃ thin film

Abstract

The insertion effect of an interface NiO layer on magnetism in Fe/BaTiO 3 is investigated by X-ray absorption spectroscopy (XAS). From X-ray magnetic circular dichroism (XMCD) analysis, the enhancement of remanent magnetization in Fe is observed with increasing NiO thickness. We also find that the NiO layer is partially composed of metallic Ni, and its thickness is estimated to be >0.4 nm from the NiO-thickness dependence of the Ni XAS intensity by assuming that Ni is localized at the interface between Fe and NiO. Moreover, extended X-ray absorption fine structure data shows that the Ni-O distance of the interface NiO layer is shorter than that of bulk NiO, which leads to the pseudomorphic growth of NiO on BaTiO 3 . We thus suppose that the improved Fe growth promoted by the interface NiO layer enhances the magnetic moment in Fe.

GLUCOSE SENSOR USING CYCLIC VOLTAMMETRIC METHOD BASED ON NiO/ITO ELECTRODE

“…NiO is one of the materials that have many of these applications today, such as gas sensors [1], [2], supercapacity [3] - [5], magnetism [6], [7], etc., in which the electrochemical glucose sensor is one of the fields which have been interested and attracts many researchers. Glucose sensor plays an important role in the diagnosis of diabetes by signaling high levels of glucose in the blood [8], [9].…”