| AVS 55th International Symposium & Exhibition | |
| Magnetic Interfaces and Nanostructures | Thursday Sessions |
| Session MI-ThP |
| Session: | Magnetic Interfaces and Nanostructures Poster Session |
| Presenter: | M.S. Seo, Seoul National University, Republic of Korea |
| Authors: | M.S. Seo, Seoul National University, Republic of Korea S.U. Cho, Seoul National University, Republic of Korea C.W. Yang, Seoul National University, Republic of Korea Y.D. Park, Seoul National University, Republic of Korea |
| Correspondent: | Click to Email |
We report on the fabrication of NiFe nanowires structures to demonstrate a magnetic analog to a coupled pendulum. Coupled high-frequency resonators have already been demonstrated in magnetic nanostructures.1 Recently, an analog to a mechanical pendulum system has been applied to measure the mass of a domain wall in NiFe nanowires.2 We have designed a NiFe nanowires structures akin to two semicircular arc segments, arranged with a mirror symmetry about the tangent, with a separation distance ≤ 100 nm. From symmetry arguments, the magnetostatic forces couple the domain walls formed at the apex of each semicircular segment. By varying the separation distances as well as driving current densities, the coupling strengths can also be modulated. The structures are patterned by e-beam lithographic techniques on a UHV sputter deposited NiFe. Each segment is probed electrically allowing for driving force as well as to detect current induced resonance effects on domain wall resistance for each segment. Along with experimental data at the extremes of coupling strengths, we will also compare the results with finite element analysis modeling.
1 S. Kaka et al., Nature 437, 389 (2005); F.B. Mancoff et al., ibid 437, 393 (2005).
2 E. Saitoh et al., Nature 432, 203 (2004).