Determination of closure domain penetration in electrodeposited microtubesby combined magnetic force microscopy and giant magneto-impedance techniques

The domain structure of electrodeposited Co90P10 microtubes exhibiting radi al magnetic anisotropy and giant magneto-impedance effect has been characte rized by combined magnetic force microscopy imaging and impedance measureme nts. It has been shown that the size of the closure domains increases with the CoP layer thickness. Furthermore, the depth of the closure domains has been quantitatively determined from the high frequency behavior. (C) 2001 A merican Institute of Physics.