Frequency-based nanoparticle sensing over large field ranges using the ferromagnetic resonances of a magnetic nanodisc.

  title={Frequency-based nanoparticle sensing over large field ranges using the ferromagnetic resonances of a magnetic nanodisc.},
  author={Maximilian Albert and Marijan Beg and Dmitri Chernyshenko and Marc-Antonio Bisotti and Rebecca Carey and Hans Fangohr and Peter J. Metaxas},
  volume={27 45},
Using finite element micromagnetic simulations, we study how resonant magnetisation dynamics in thin magnetic discs with perpendicular anisotropy are influenced by magnetostatic coupling to a magnetic nanoparticle. We identify resonant modes within the disc using direct magnetic eigenmode calculations and study how their frequencies and spatial profiles are changed by the nanoparticle's stray magnetic field. We demonstrate that particles can generate shifts in the resonant frequency of the disc… 
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The detection down to a single nanoparticle is demonstrated, therefore the device holds the potential for the localization and detection of small numbers of molecules immobilized on the particle's functionalized surface.
Localized magnetic fields enhance the field sensitivity of the gyrotropic resonance frequency of a magnetic vortex
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This sensor's performance relies predominantly on STO properties such as spectral linewidth and frequency dispersion with magnetic field, rather than signal amplitude as in conventional magnetoresistive sensors, and is shown in measured devices to achieve large signal to noise ratios.
One-Dimensional Magnonic Crystal for Magnetic Field Sensing
Magnetic field sensor capacity of one-dimensional magnonic crystals was investigated. The surface of YIG film was modulated by periodic Cu stripes and magnet array in one dimension. The surface
Ultrasensitive magnetic biosensor for homogeneous immunoassay.
  • Y. Chemla, H. Grossman, +4 authors J. Clarke
  • Chemistry, Medicine
    Proceedings of the National Academy of Sciences of the United States of America
  • 2000
A technique is described for specific, sensitive, quantitative, and rapid detection of biological targets by using superparamagnetic nanoparticles and a "microscope" based on a high-transition
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Transfer of angular momentum from a spin-polarized current to a ferromagnet provides an efficient means to control the magnetization dynamics of nanomagnets. A peculiar consequence of this spin
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Using e-beam patterned masks on the sensors, it was confirmed that the particles in the trench, particularly those near the edges of the stripes, mainly affect the sensor signals due to additional field from the stripe under an applied field.
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The influence of randomly distributed lattice defects (non-patterned areas and variable hole size) on the ferromagnetic resonance behaviour and spin wave mode profiles of 2D magnonic crystals based on Ni80Fe20 antidot arrays with hexagonal lattice is studied.