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Number sensitive detection and direct imaging of dipolar coupled magnetic nanoparticles by tunnel magnetoresistive sensors
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10.1063/1.3253410
/content/aip/journal/apl/95/16/10.1063/1.3253410
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/16/10.1063/1.3253410
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Elliptic sensor covered with magnetic nanoparticles. (a) Shows an AGM measurement of the particles and (b) the linear sensor response to an external magnetic field.

Image of FIG. 2.
FIG. 2.

in dependency of the sensor coverage by magnetic nanoparticles. The measurements can be divided in three regimes. For high particle coverage strong dipolar coupling can be observed leading to a hysteresis in the obtained sensor signal (inset).

Image of FIG. 3.
FIG. 3.

Calculated values for different sensor coverage. The inset shows the hysteresis of the particle lattice for a high degree of coverage of the sensor.

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/content/aip/journal/apl/95/16/10.1063/1.3253410
2009-10-20
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Number sensitive detection and direct imaging of dipolar coupled magnetic nanoparticles by tunnel magnetoresistive sensors
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/16/10.1063/1.3253410
10.1063/1.3253410
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