| 近场光、磁混合记录 |
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| 引用本文： | 黄浩,吕淑琴,张小嘎.近场光、磁混合记录[J].计算机工程与应用,2004,40(24):12-13. |
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| 作者姓名： | 黄浩 吕淑琴 张小嘎 |
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| 作者单位： | 华中科技大学计算机学院,武汉,430074 |
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| 基金项目： | 国家自然科学基金项目资助(编号:69773074)，国家973重点基础研究资助项目(编号:G19990330) |
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| 摘 要： | 磁记录密度每年增长60%以上,而由于保持记录位稳定的各向异性能的减小,磁颗粒的大小和厚度不能无限增长下去,较小的各向异性能难以保证数据的稳定,由于矫顽力依赖于温度,可以采用高矫顽力的磁记录材料,用激光加热来降低矫顽力确保信息的写入。
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| 关 键 词： | 混合记录 热稳定性 超顺磁极限 |
| 文章编号： | 1002-8331-(2004)24-0012-02 |
Near Filed Optical Magnetic Hybrid Recording |
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| Huang Hao Lv,Shuqin Zhang Xiaoga.Near Filed Optical Magnetic Hybrid Recording[J].Computer Engineering and Applications,2004,40(24):12-13. |
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| Authors: | Huang Hao Lv Shuqin Zhang Xiaoga |
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| Abstract: | The growth rate in the areal density of hard disk drives has been around60%～100%per year.As far as the media is concerned,a reduction in grain size and thickness cannot continue forever,because the anisotropy energy(KuV),which maintains the stability of the bits,gets reduced.For small values of KuV,the thermal energy(kBT)at room temperature increases the probability of data erasure.Since the coercivity is dependent on temperature,an external laser may be used to locally reduce its value to a point where the field from the magnetic head is sufficient to switch the magnetization. |
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| Keywords: | hybrid recording thermal Instability super paramagnetic limits |
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