| DOI | Resolve DOI: https://doi.org/10.1038/nnano.2016.226 |
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| Author | Search for: Wu, Marcelo1; Search for: Wu, Nathanael L.-Y.1; Search for: Firdous, Tayyaba1; Search for: Fani Sani, Fatemeh1; Search for: Losby, Joseph E.1; Search for: Freeman, Mark R.1; Search for: Barclay, Paul E.1 |
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| Affiliation | - National Research Council of Canada. Nanotechnology
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| Format | Text, Article |
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| Abstract | Nanophotonic optomechanical devices allow the observation of nanoscale vibrations with a sensitivity that has dramatically advanced the metrology of nanomechanical structures and has the potential to impact studies of nanoscale physical systems in a similar manner. Here we demonstrate this potential with a nanophotonic optomechanical torque magnetometer and radiofrequency (RF) magnetic susceptometer. Exquisite readout sensitivity provided by a nanocavity integrated within a torsional nanomechanical resonator enables observations of the unique net magnetization and RF-driven responses of single mesoscopic magnetic structures in ambient conditions. The magnetic moment resolution is sufficient for the observation of Barkhausen steps in the magnetic hysteresis of a lithographically patterned permalloy island. In addition, significantly enhanced RF susceptibility is found over narrow field ranges and attributed to thermally assisted driven hopping of a magnetic vortex core between neighbouring pinning sites. The on-chip magnetosusceptometer scheme offers a promising path to powerful integrated cavity optomechanical devices for the quantitative characterization of magnetic micro- and nanosystems in science and technology. |
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| Publication date | 2016-10-31 |
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| Publisher | Nature Publishing Group |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23003218 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 78c6c9ba-31bd-400f-b22b-ad56fc9b2426 |
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| Record created | 2018-05-08 |
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| Record modified | 2020-03-16 |
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