Magnetic switching field distribution and morphology in electrodeposited Ni@Cu coaxial nanotubes

Abstract

Using magnetic measurements structural irregularities in electrodeposited nanotubes are inferred. The correlation between morphology and magnetic properties is very useful for studying materials. Through the use of the magnetic switching field distribution, the association with the surface irregularities imperfections of the magnetic nanotubes was performed. The distribution of magnetic switching field presents well behaved in smooth-surface nanotubes and, for nanotubes with irregularities, the distribution of switching fields has a noisy behavior, added to that smoothed signal. This noise is due to the superficial irregularities on the tubes surface because the magnetic barriers occurring in imperfect structures. Pinning centers due to irregularities are the principal aspect to observe in this situation. Magnetic measurements were associated directly to the morphology obtained by scanning electron microscopy.