Anomalous Field Dependence Of Torque Curves

Influence of K2 The influence of %e second order anisotropy constant K2 is often neglected because it is only a few percent of K1. However for most perpendicular storage media Keff is around zero and therefore the influence of K2 can be considerable. In table 1 this is expressed in column 3 which shows that the agreement between theory and experiment for the alumite samples increased. For the Co-Cr samples the slope even reversed its sign. It can be concluded that with taking K2 into account the agreement increased for the sample with a negative K,w For positive Keff the agreement between experiment and theory decreases.