FePt–C graded media for ultra-high density magnetic recording
FePt–C graded media for ultra-high density magnetic recording
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DOI：
10.1088/0022-3727/43/18/185001
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发表时间：
2010-05
期刊：
影响因子：
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通讯作者：
J. -. Chen;L. Huang;J. Hu;G. Ju;G. Chow
中科院分区：
文献类型：
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作者：
J. -. Chen;L. Huang;J. Hu;G. Ju;G. Chow
制备了由三层FePt-C组成的三层FePt-C梯度介质，其中每层FePt-C在不同的衬底温度下沉积。单层硬层FePt-C具有11.4kOe的大的矫顽力，而三层样品的矫顽力仅为5.7kOe。在不牺牲介质的热稳定性的情况下实现了2的介电常数降低因子。三层介质揭示了非相干磁化开关畴壁传播。显微结构表明，三层FePt-C梯度介质是梯度介质与改进的耦合颗粒连续（CGC）介质的结合。这种新型梯度介质具有较低的开关场和相当的热稳定性，并应具有CGC介质的优点-较低的跃迁噪声。
Tri-layer FePt–C graded media composed of three FePt–C layers with each single FePt–C layer deposited at different substrate temperatures were fabricated. The single hard layer FePt–C had a large coercivity of 11.4 kOe, while the coercivity of the tri-layer sample was only 5.7 kOe. A coercivity reduction factor of 2 was achieved without sacrificing the thermal stability of the media. The tri-layer media revealed incoherent magnetization switching—domain wall propagation. The microstructure showed that the tri-layer FePt–C graded media were graded media combined with modified coupled granular continuous (CGC) media. This new kind of graded media had a lower switching field and comparable thermal stability and should have the advantage of CGC media—lower transition noise.