Diffusion in annealing of nanocrystalline Ni80Fe20/Cu composite wires

Weak magnetic field sensors have always been an area of great interest due to their immense potential applications in a wide array of fields such as magnetic anomaly detectors (MAD) in defence-related industry or bio-magnetic field sensors in biomedical industry. The performance of such sensors greatly depends on the magnetic softness of the sensing elements. Thus, optimisation of the post-heat treatment process is crucial as it serves to release stresses induced during the deposition process. In this study, furnace annealing was carried out on Ni