Issues in Determining Activation Volume in Magnetic Recording Media (<特集>光記録・情報記録材料,一般)

概要

論文の詳細を見る
The field dependence of the activation volume (V_A) is determined for longitudinal recording media by several different methods. For two methods, which use the irreversible magnetisation, V_A is found to increase for larger reversing fields up to the coercivity (H_c). The V_A as determined from the time dependence of the total magnetisation including the reversible magnetisation, yields the opposite behavior: V_A is found to be much larger at low fields and found to decrease for larger reversing fields up to H_c. The difference between the methods is found to be attributed to the large difference between the total magnetisation and irreversible magnetisation, which is particularly large for small reversing fields. Around H_c however, the different methods yield comparable results.
社団法人電子情報通信学会の論文
2001-03-08