基于DC磁场的磁畴扩大读出技术  

MAMMOS Readout with DC Magnetic Field

作　　者：石田弘毅 野口仁志 山口淳 高木直之 三谷健一郎 久米实 王飞 

机构地区：[1]三洋电机株式会社Hypermedia研究所 [2]全国磁性记录材料信息站,河北保定071054

出　　处：《信息记录材料》2002年第1期7-10,13,共5页Information Recording Materials

摘　　要：MAMMOS(MagneticAMplifyingMagneto-OpticalSystem)是磁畴扩大读出技术之一。该技术是将记录层的微小磁畴扩大复印到读出层,可防止微小磁畴中的信号降低,实现高分辨率的读出。读出时的磁场采用DC磁场,具有利用更简易的系统即可读出的优点。记录层采用RE-rich(富含稀土)的GdFeCo(钆铁钴),读出时施加10ka/m的DC磁场,0.25μm的连续磁畴,可获得43dB的CNR。与CAD-MSR相比,最突出的是0.3μm以下的磁畴的CNR得到了极大的改善,有利于更微小磁畴的读出。A new type of MAMMOS(Magnetic AMplifying Magneto-Optical System)was proposed.This method needs only a DC magnetic field for expanding and erasing the magnetic domains and RE(Rare-Earth)-rich GdFeCo was used for readout layer.In this system,43dB of CNR was obtained for 0.25 μm packed domains by applying 10 kA/m of DC magnetic field.Compared with the conventional CAD(Center Aperture Detection)disk,CNR for the domains smaller than 0.3 μm was improved.This method exhibited a high readout resolution in spite of an AC field-free method.

关 键 词：DC磁场 磁畴扩大读出技术 磁光记录 MAMMOS GdFeCo 读出层 读出窗口 磁畴壁 

分 类 号：TQ581[化学工程—精细化工]