Emergent magneto-inductance effect in NiFe thin films on glass substrates at room temperature

Zhang, Z.*; Funato, Takumi*; Matsuo, Mamoru; 5 of others*

We investigate an emergent magneto-inductance (EML) effect using stepwise magnetic field with AC current in NiFe and NiFe thin films on glass substrates. The properties of the EML effect were evaluated in terms of frequency, stepwise magnetic field, cross-sectional area, and the proportion of Ni and Fe. As a result, a large EML (1.5 H) is observed under a low magnetic field of 10 Oe in NiFe thin films at room temperature. The EML effect can be enhanced by increasing the stepwise magnetic field increment or decreasing the cross-sectional area of NiFe thin films. NiFe/glass exhibits a larger EML effect compared to that of NiFe/glass, indicating that the EML depends on the strength of induced magnetic anisotropy. The observed EML effect can be explained by theoretical calculation based on the spin motive force owing to the transient current-driven domain-wall motion. These experimental and theoretical findings provide a deeper understanding on the mechanism of EML effect, and pave the way for potential applications, such as miniaturized inductors and magnetic sensors