A comparison between different methods for evaluating the particle interactions in magnetic recording systems
A comparison between different methods for evaluating the particle interactions in magnetic recording systems
复制标题
评估磁记录系统中粒子相互作用的不同方法的比较
DOI：
10.1109/intmag.1998.742157
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
A. Cecchetti
中科院分区：
文献类型：
--
作者：
G. Bottoni;D. Candolfo;A. Cecchetti
比较了确定记录系统中磁性颗粒间相互作用的两种不同方法。第一个是基于对非相互作用粒子的 Wohlfarth 方程的偏差 /spl Delta/m 的评估，这需要测量剩磁曲线。另一个是更简单的程序，其包括根据基于初始磁化曲线和磁滞回线的方程确定偏差/spl Delta/m*。对于定向单轴各向异性粒子系统，解通常为 /spl Delta/m/spl cong/2/spl Delta/m*，而对于定向多轴粒子系统或随机定向粒子，解为 /spl Delta/m/spl cong/4/spl Delta/m*。第二种方法的优点是它适用于必须通过退磁场校正初始曲线和磁滞回线的系统，就像垂直于膜平面磁化的 CoCr 膜一样。
Two different methods for the determination of the magnetic interparticle interactions in recording systems are compared. The first one is that based on the evaluation of the deviation /spl Delta/m from the Wohlfarth equation for noninteracting particles which requires the measurement of the remanence curves. The other is an easier procedure which consists in the determination of the deviation /spl Delta/m* from an equation based on the initial magnetization curve and the hysteresis loop. For systems of oriented uniaxial anisotropy particles the solution is generally /spl Delta/m/spl cong/2/spl Delta/m*, while for systems of oriented multiaxial particles or for random oriented particles it is /spl Delta/m/spl cong/4/spl Delta/m*. The advantage of the second method is its applicability to systems where the initial curve and the hysteresis loop must be corrected by the demagnetizing field as for CoCr films magnetized perpendicularly to the film plane.