Effective reduction of the coercivity for Co72Pt28 thin film by exchange coupled Co81Ir19 soft layer with negative magnetocrystalline anisotropy

Effective reduction of the coercivity for Co72Pt28 thin film by exchange coupled Co81Ir19 soft layer with negative magnetocrystalline anisotropy
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负磁晶各向异性交换耦合Co81Ir19软层有效降低Co72Pt28薄膜矫顽力

DOI:
10.1088/1361-6463/aaa389
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发表时间:
2017-12
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
通讯作者:
Li F. S.
Li F. S.
中科院分区:
其他
文献类型:
--
作者:
Jiao J. Y.;Ma T. Y.;Li Z. W.;Qiao L.;Wang Y.;Wang T.;Li F. S.

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本文报道了具有负软层磁晶各向异性的Co 72 Pt 28/Co 81 Ir 19交换耦合复合介质的磁率变化。研究结果表明,样品中的硬质层(HL)为柱状晶组织,晶粒分布均匀,具有六方晶系结构的SL生长在具有相同织构的HL上。因此,如磁性表征所证明的,已经实现了两个层的强耦合。重要的是,我们观察到一个更有效的减少ECC媒体的反磁性使用SL与负MA相比,使用SL与正或可忽略的MA。实验结果与理论计算相吻合。
We report on the investigation of coercivity changes of the Co72Pt28/Co81Ir19 exchange-coupled composite (ECC) media with negative soft-layer (SL) magnetocrystalline anisotropy (MA). Our results show that the hard-layer (HL) of our sample exhibits a columnar type microstructure with well isolated grains and the SL with hcp-structure grows on top of the HL with the same texture. Therefore, strong coupling of the two layers have been realized as evidenced by the magnetic characterization. Importantly, we observe a more effective reduction of the coercivity of the ECC media by using SLs with negative MA when compared to the use of SLs with positive or negligible MA. The experimental results are corroborated by theoretical calculations.
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