Influence of Thickness on Magnetic Properties and Microwave Characteristics of NiFe/IrMn/NiFe Trilayers
Influence of Thickness on Magnetic Properties and Microwave Characteristics of NiFe/IrMn/NiFe Trilayers
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DOI：
10.1109/tmag.2011.2159486
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发表时间：
2011-09
影响因子：
2.1
通讯作者：
Feng Xu;Z. Liao;Qijun Huang;N. N. Phuoc-N.;C. Ong;Shandong Li
中科院分区：
文献类型：
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作者：
Feng Xu;Z. Liao;Qijun Huang;N. N. Phuoc-N.;C. Ong;Shandong Li
交换偏置效应能有效地提高软磁薄膜的铁磁共振频率。本文研究了不同Ni_（81）Fe_（19）和Ir_（25）Mn_（75）厚度的Ni_（81）Fe_（19）/Ir_（25）Mn_（75）/Ni_（81）Fe_（19）三层薄膜的静磁性能和微波特性。通过添加Ir 25 Mn 75中间层，三层结构的有效阻尼得到了提高，且没有交换偏置效应。观察到的交换偏置效应与较厚的Ir 25 Mn 75中间层。磁导率谱中的两个共振频率是由于在三层膜的两个界面处存在不同的界面交换耦合，并且它们随着Ni_（81）Fe_（19）层厚度的减小而增大。
Exchange-bias effect is effective in in creasing the ferromagnetic resonance frequency of soft magnetic thin films. This paper studies the static magnetic properties and microwave characteristics of Ni81Fe19/Ir25Mn75/Ni81Fe19 trilayers with various Ni81Fe19 and Ir25Mn75 thicknesses. With an ultrathin Ir25Mn75 interlayer, the trilayer has an enhanced effective damping without exchange-bias effect. The exchange-bias effect is observed with a thicker Ir25Mn75 interlayer. The two resonance frequencies in permeability spectra are due to the different interfacial exchange couplings at the two interfaces of trilayers, and they increase with decreasing Ni81Fe19 layer thickness.