Preparation and Magnetic Properties of Cylindrical NiFe Films and Antidot Arrays
Continuous NiFe (Permalloy) cylindrical films and arrays of cylindrical NiFe antidots 7 nm thick have been prepared by sputtering onto cylindrical aluminum wires and onto wires anodized to form a porous anodic alumina layer. The antidots are arranged in a close-packed pattern determined
by the hexagonal pore arrangement in the porous alumina, with period 103 nm and diameter 42 nm. Hysteresis loops were measured at different angles with respect to the cylinder axis and indicate an easy plane normal to the radius of the wire. The antidots enhance the coercivity compared to
the continuous cylindrical film.
Keywords: ANODIC ALUMINA; CYLINDRICAL PERMALLOY ANTIDOTS; CYLINDRICAL PERMALLOY THIN FILM; MAGNETIZATION PROCESS
Document Type: Short Communication
Publication date: 01 October 2010
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