Abstract
Microwave properties of ferromagnetic nanowire arrays patterned with periodic and quasi-periodic structures were investigated in this study. The periodic and quasi-periodic structures were designed based on Fibonacci sequence and golden ratio. Ni nanowires arrays were electrodeposited in anodic aluminum oxide (AAO) templates with patterned Cu electrodes, and then the AAO templates were attached to the coplanar waveguide lines fabricated on quartz substrate for measurement. The S21 of both periodic and quasi-periodic structure-patterned Ni nanowire arrays showed an extra absorption peak besides the absorption peak due to the ferromagnetic resonance of Ni nanowires. The frequency of the absorption peak caused by the patterned structure could be higher than 40 GHz when the length and arrangement of the structural units were modified. In addition, the frequency of the absorption peak due to the quasi-periodic structure was calculated based on a simple analytical model, and the calculated value was consistent with the measured one. The experimental data showed that it could be a feasible approach to tune the performance of microwave devices by patterning ferromagnetic nanowires.
| Original language | English |
|---|---|
| Article number | 17E513 |
| Journal | Journal of Applied Physics |
| Volume | 117 |
| Issue number | 17 |
| Early online date | 10 Apr 2015 |
| DOIs | |
| Publication status | Published - 7 May 2015 |
| Externally published | Yes |
Funding
This work was supported by the National Science and Technology Major Project of the Ministry of Science and Technology of China (Grant No. 2011ZX02601) and the Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry. The authors thank Professor Jing-feng Li and Ms. Siyang Li for the help on photolithography.