composed of Iron and Nickel. They are manufactured in the form of tape and wire and used in Electronic Article Surveillance (EAS) systems. 1.6 Magnetic anisotropy Magnetic anisotropy is defined as the directional dependence of the magnetic properties for materials. Strong easy-axis anisotropy is a prerequisite for hard magnetism while near-zero anisotropy is desirable for soft magnets. Generally, the tendency for magnetization to lie along an easy axis is represented by the energy density