Abstract
Co/Au multilayered magnetic nanowires with a diameter of 200 nm were electrodeposited into nanoporous anodic aluminum oxide (AAO) templates. Coplanar waveguide transmission lines were patterned on the AAO templates that were filled with the Co/Au nanowires. Noise suppressors based on pure Co and Au nanowires were also fabricated as references. The transmission coefficient S 21 of the device based on Co nanowires showed an absorption peak due to the loss of ferromagnetic resonance; S 21 of the device based on Au nanowires decreased linearly with increasing frequency due to the loss of eddy current. S 21 of the noise suppressors based on Co/Au multilayered nanowires showed a dual-band absorption phenomenon, because of the ferromagnetic resonance of the nanowires and the periodicity of the magnetic/nonmagnetic nanostructure. The frequencies of the two absorption peaks were 24-25 GHz and 36-38 GHz, which indicated that the working frequency of the microwave devices could be beyond 20 GHz. © 2012 IEEE.
| Original language | English |
|---|---|
| Article number | 6332810 |
| Pages (from-to) | 4398-4401 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Magnetics |
| Volume | 48 |
| Issue number | 11 |
| Early online date | 18 Oct 2012 |
| DOIs | |
| Publication status | Published - Nov 2012 |
| Externally published | Yes |
Bibliographical note
ACKNOWLEDGMENT This work was supported in part by National Science and Technology Major Project under Contract No. 2009ZX02038, Tsinghua National Laboratory for Information Science and Technology (TNList) Cross-discipline Foundation, Tsinghua University Initiative Scientific Research Program, and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry. The authors thank Dr. Y. Xu at Tsinghua University for the help on photolithography.Keywords
- Co/Au multilayered nanowires
- Ferromagnetic resonance
- Microwave properties
- Noise suppression