MFM Images Obtained by Electrodeposited Magnetic Tips

MFM images of a magnetic head and a recording medium, obtained using electrodeposited FeNi, Co and FeCo tips, show quite different features. These differences are explained by the magnetic properties, saturation magnetization and coercive force of the magnetic thin films electrodeposited on the tungsten wires to form the tips. We attempted to observe the magnetic structure of the tip by using magnetostatic bacteria that swim along the lines of the magnetic field originating from the poles on the tip.