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Ultrawide frequency linewidth of the permeability spectra of FeCoN thin film sputtered on the flexible substrate |
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| Authors: | F Xu X Chen XY Zhang CK Ong |
| Institution: | a Department of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China b Center for Superconducting and Magnetic Materials, Department of Physics, National University of Singapore, Singapore 117542, Singapore c Temasek Laboratories, National University of Singapore, Singapore 117411, Singapore |
| Abstract: | Analysis shows that it is possible to make use of dispersed magnetic ripple fields to obtain a wide frequency linewidth of permeability spectra of soft magnetic thin films. As-sputtered FeCoN thin film sputtered on flexible Kapton substrate is studied as an example. It has ultrawide frequency linewidths of its resonance peaks in the permeability spectra, compared to its counterpart deposited on Si substrate. The frequency linewidth of FeCoN on Kapton substrate decreases with external magnetic field, showing a different field dependence from that of FeCoN on Si substrate. The ultrawide frequency linewidth and its decrease with external magnetic field are ascribed to the dispersed magnetic ripple fields caused by the flexible substrate. This work shows that the flexible substrate is effective in obtaining a wide frequency linewidth of the permeability spectra of soft magnetic thin films. |
| Keywords: | Permeability spectra Soft magnetic thin film Magnetic ripple Flexible substrate |
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