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Magneto-mechanical resonance of a single superparamagnetic microbead trapped by a magnetic domain wall
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10.1063/1.3672406
/content/aip/journal/jap/111/7/10.1063/1.3672406
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/7/10.1063/1.3672406
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Magnetostatic potential energy vs lateral position for a 2 μm diameter SPM bead at the surface of a 400 nm wide × 40 nm thick Ni80Fe20 track containing a vortex wall. (b) Micromagnetically computed domain wall structure in a 400 nm wide × 40 nm thick Ni80Fe20 track with a schematic of the oscillator geometry in the bead-DW system.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Optical image of a 2.8 μm diameter bead on a 30 μm outer diameter, 800 nm wide, 40 nm thick Ni80Fe20 ring (SEM inset), with field configuration and probe laser spot location (green circle). (b) Real time response of reflected laser intensity (top) as a bead is driven in and out of the beam spot by a DW driven by small amplitude, sinusoidal ac field (bottom).

Image of FIG. 3.
FIG. 3.

(Color online) Resonant excitation of trapped 1 μm diameter and 2.8 μm diameter SPM bead in aqueous environment by oscillating DW in circular magnetic track. Curves show in-phase and out-of-phase optical reflectivity signal, approximately proportional to bead oscillation amplitude.

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/content/aip/journal/jap/111/7/10.1063/1.3672406
2012-02-23
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magneto-mechanical resonance of a single superparamagnetic microbead trapped by a magnetic domain wall
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/7/10.1063/1.3672406
10.1063/1.3672406
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