Magnetic Response of Surface Plasmons in Ag75Co25 Non-Solid Solution Films
Magnetic Response of Surface Plasmons in Ag75Co25 Non-Solid Solution Films
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Ag75Co25 非固溶体薄膜中表面等离子体的磁响应
DOI：
10.3379/msjmag.1403r006
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发表时间：
2014
影响因子：
--
通讯作者：
K. Nakagawa
中科院分区：
文献类型：
--
作者：
Toru Tachikawa;Y. Ashizawa;K. Nakagawa
表面等离子体激元（SPP）的磁响应具有用作磁传感器的潜力。为此，选择非固溶体材料（Ag-Co系统）进行评估，因为这种材料有望有效地激发SPP，同时还可以大大提高单层的磁灵敏度。在Ag-Co非固溶体薄膜中，Ag是良好的SPP激发材料，而Co是铁磁材料。通过改变薄膜厚度和波长，研究了 Ag-Co 单层薄膜中 SPP 的激发和磁响应，结果发现，薄膜厚度为 35-50 nm 时，两者都获得了最佳特性。 SPP 的最大磁响应（定义为在 0 到 400 mT 之间的外加磁场下反射率变化的比率）确定为 ~0.29。因此，Ag-Co非固溶体体系是获得SPP大磁响应的良好材料。
The magnetic response of surface plasmon polaritons (SPPs) has the potential to be utilized as a magnetic sensor. To this end, a non-solid solution material (Ag-Co system) was selected for evaluation, as such materials are expected to efficiently excite the SPPs, while also highly increasing the magnetic sensitivity with a single layer. In the Ag-Co non-solid solution film, Ag is a good SPP excitation material, whereas Co is a ferromagnetic material. The excitation and magnetic response of the SPPs in Ag-Co single layer films were investigated by varying the film thickness and wavelength, from which it was found that the optimal characteristics for both were obtained with films 35–50 nm thick. The largest magnetic response of the SPPs, as defined by the ratio of reflectivity change under the applied magnetic field between zero and 400 mT, was determined as ~0.29. The Ag-Co non-solid solution system therefore represents a good material for obtaining a large magnetic response of SPPs.