Synthesis and property tunability of interparticle exchange-decoupled L10-FePt:Au/Fe perpendicular ECC films
Synthesis and property tunability of interparticle exchange-decoupled L10-FePt:Au/Fe perpendicular ECC films
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DOI：
10.1016/j.jallcom.2013.12.142
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发表时间：
2014-03
影响因子：
6.2
通讯作者：
C. Feng;Kui Gong;Chuan Xu;Meiyin Yang;Xu-Jing Li;Baohe Li;Guang-Hua Yu
中科院分区：
文献类型：
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作者：
C. Feng;Kui Gong;Chuan Xu;Meiyin Yang;Xu-Jing Li;Baohe Li;Guang-Hua Yu
L10-FePt基垂直交换耦合复合（ECC）薄膜同时具有弱的FePt粒子间交换耦合（IPEC）和强的硬/软交换耦合（HSEC），对于同时提高记录介质的信噪比和可写性至关重要。本文报道了L10-FePt：Au/Fe ECC薄膜的合成和磁性能的可调谐性，其具有相邻L10-FePt颗粒之间的低IPEC和硬L10-FePt：Au复合层与软Fe层之间的强HSEC。此外，磁畴结构的研究揭示了畴壁辅助磁化反转机制。耦合的Fe层促进了L10-FePt：Au复合层中的反向成核和磁化反转，导致在保持高的热稳定性的同时显著降低了开关场。
L10-FePt based perpendicular exchange coupled composite (ECC) films with both weak FePt interparticle exchange coupling (IPEC) and strong hard/soft exchange coupling (HSEC) are virtually crucial to improve the signal-to-noise ratio and the writability of recording media concurrently. This article reports synthesis and magnetic property tunability of the L10-FePt:Au/Fe ECC film with low IPEC between neighboring L10-FePt particles and strong HSEC between the hard L10-FePt:Au composite layer and the soft Fe layer. Moreover, the magnetic domain configuration study reveals the domain wall assisted magnetization reversal mechanism. The coupled Fe layer facilitates reverse nucleation and magnetization reversal in the L10-FePt:Au composite layer, leading to remarkable reduce of the switching field while maintaining high thermal stability.