Thermal decay estimation of perpendicular magnetic recording

To facilitate the design of a thermally stable perpendicular magnetic recor ding read/write system, we have developed a simple method of estimating the rmal decay characteristics from only a small amount of information about th e head/media and R/W conditions. The thermal decay of written pattern is es timated based on three factors: demagnetization field, history of magnetiza tion reversal and distribution of K-u V/k(0) T. We verify its accuracy by u sing measured data of VSM and R/W tester. (C) 2001 Elsevier Science B.V. Al l rights reserved.