“…In particular, considerable efforts have been made in the area of quasi-one-dimensional (1D) nanostructured materials, such as nanotubes, nanowires, and nanorods. More recently, ferromagnetic (FM) nanotubes have been successfully fabricated by various methods [1][2][3][4][5], and their magnetic properties have been investigated experimentally [3][4][5][6][7][8][9]. Magnetic nanotubes have been attracting much attention due to their potential applications, such as ultrahigh-density magnetic storage devices, biotechnology, nanomedicine, and nanoelectronic devices, etc.…”