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01724 am a22002533u 4500 |
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383026 |
| 042 |
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|a dc
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|a Metaxas, Peter J.
|e author
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|a Sushruth, Manu
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|a Begley, Ryan A.
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|a Ding, Junjia
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|a Woodward, Robert C.
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|a Maksymov, Ivan S.
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|a Albert, Maximilian
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|a Wang, Weiwei
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|a Fangohr, Hans
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|a Adeyeye, Adekunle O.
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|a Kostylev, Mikhail
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|a Sensing magnetic nanoparticles using nano-confined ferromagnetic resonances in a magnonic crystal
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|c 2015-06-11.
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|z Get fulltext
|u https://eprints.soton.ac.uk/383026/1/1501.01171v1.pdf
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|a We demonstrate the use of the magnetic-field-dependence of highly spatially confined, GHz-frequency ferromagnetic resonances in a ferromagnetic nanostructure for the detection of adsorbed magnetic nanoparticles. This is achieved in a large area magnonic crystal consisting of a thin ferromagnetic film containing a periodic array of closely spaced, nano-scale anti-dots. Stray fields from nanoparticles within the anti-dots modify resonant dynamic magnetisation modes in the surrounding magnonic crystal, generating easily measurable resonance peak shifts. The shifts are comparable to the resonance linewidths for high anti-dot filling fractions with their signs and magnitudes dependent upon the modes' localisations (in agreement with micromagnetic simulation results). This is a highly encouraging result for the development of frequency-based nanoparticle detectors for high speed nano-scale biosensing.
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|a accepted_manuscript
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|a Article
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