| DOI | Resolve DOI: https://doi.org/10.1126/science.1231390 |
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| Author | Search for: Burgess, J. A. J.1; Search for: Fraser, A. E.; Search for: Fani Sani, F.1; Search for: Vick, D.; Search for: Hauer, B. D.; Search for: Davis, J. P.1; Search for: Freeman, M. R.1 |
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| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
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| Format | Text, Article |
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| Subject | ferromagnetic material; magnetic nanoparticle; magnetic method; mechanical theory; quantitative analysis; quantum mechanics; torsion; Barkhausen effect; energy transfer; film; ion therapy; magnetism; magnetometry |
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| Abstract | Quantitative characterization of intrinsic and artificial defects in ferromagnetic structures is critical to future magnetic storage based on vortices or domain walls moving through nanostructured devices. Using torsional magnetometry, we observe finite size modifications to the Barkhausen effect in the limiting case of a single vortex core interacting with individual pointlike pinning sites in a magnetic thin film. The Barkhausen effect in this limit becomes a quantitative two-dimensional nanoscale probe of local energetics in the film. Tailoring the pinning potential using single-point focused ion beam implantation demonstrates control of the effect and points the way to integrated magneto-mechanical devices incorporating quantum pinning effects. |
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| Publication date | 2013 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21271868 |
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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 | 3805292c-cd81-4f77-bed3-f35492c8b712 |
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| Record created | 2014-04-24 |
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| Record modified | 2020-04-22 |
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