Investigation of the Longitudinal Magnetic Field Effect on Multilayered- Films Fabricated on Single-Crystal and Metal Substrates

We discuss the longitudinal magnetic field (LMF) effect in BaHfO3 (BHO)-doped multilayered (ML) [Formula Omitted] (SmBCO) films. We observed critical current density [Formula Omitted] enhancement in the form of a [Formula Omitted] peak with increasing magnetic fields due to the LMF effect at various measurement temperatures on an ML-SmBCO film fabricated on a single-crystalline substrate. These [Formula Omitted] peaks were higher than [Formula Omitted] under self-field, and the [Formula Omitted] gain was temperature dependent. We concluded that the [Formula Omitted] gain was related to the BHO nanorod diameter and the diameter of flux lines along the [Formula Omitted]-plane. We also attempted to determine the [Formula Omitted] gain of SmBCO films with a similar film structure that were fabricated on IBAD-MgO-buffered metal substrates.