Microstructure and thermal stability of advanced longitudinal media
Microstructure and thermal stability of advanced longitudinal media
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DOI：
10.1109/20.824423
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发表时间：
2000
影响因子：
2.1
通讯作者：
M. Doerner;K. Tang;T. Arnoldussen;Haoqun Zeng;M. Toney;D. Weller
中科院分区：
文献类型：
--
作者：
M. Doerner;K. Tang;T. Arnoldussen;Haoqun Zeng;M. Toney;D. Weller
热稳定性最终将限制传统纵向记录可实现的最大面密度。影响热稳定性的介质微观结构的关键方面是晶粒尺寸和晶粒尺寸分布、合金成分、合金偏析、晶格缺陷和应变。晶粒尺寸分布是由介质沉积过程中发生的随机成核过程产生的。对于玻璃基板上的介质，可以通过平行于基板表面的 Co (112~0) 或 (101~0) 平面来实现 c 轴面内择优取向。由于更强的晶体结构，(112~0) 取向观察到改善的方形度 S，然而，与 (101~0) 相比，随着磁性层厚度的减小，观察到矫顽力发生更大的变化。面密度的持续增加将需要更紧密的晶粒尺寸分布和改进非常薄的磁性层的微观结构控制。
Thermal stability will ultimately limit the maximum areal density achievable with conventional longitudinal recording. The key aspects of the media microstructure contributing to thermal stability are the grain size and grain size distribution, alloy composition, alloy segregation, lattice defects and strain. Grain size distributions are created by the random nucleation processes occurring during media deposition. For media on glass substrates, c-axis in-plane preferred orientation can be achieved with either Co (112~0) or (101~0) planes parallel to the substrate surface. Improved squareness, S, is observed with the (112~0) orientation due to stronger crystallographic texture, however, larger changes in coercivity with decreasing magnetic layer thickness are observed compared to (101~0). Continued increases in areal density will require tighter grain size distributions and improved microstructural control of very thin magnetic layers.