Number sensitive detection and direct imaging of dipolar coupled magnetic nanoparticles by tunnel magnetoresistive sensors

Albon C, Weddemann A, Auge A, Meissner D, Rott K, Jutzi P, Hütten A (2009)
APPLIED PHYSICS LETTERS 95(16).

Journal Article | Published | English

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Abstract
The suitability of magnetic tunnel junctions for the detection of magnetic nanoparticles is related to their scalability onto the nanoscale size regime without a significant loss of sensitivity. Elliptically shaped MgO based tunnel magnetoresistance sensors are used to provide a sharp detection of 14 nm Co nanoparticles. The measured signal is related to the degree of coverage of the sensor area by a nanoparticle layer. Moreover, the nanoparticles magnetostatic interaction on the sensor surface is clearly distinguished by the presence of a coercitive field in the detected signal. Experimentally obtained results are compared to theoretical models. (C) 2009 American Institute of Physics. [doi:10.1063/1.3253410]
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Albon C, Weddemann A, Auge A, et al. Number sensitive detection and direct imaging of dipolar coupled magnetic nanoparticles by tunnel magnetoresistive sensors. APPLIED PHYSICS LETTERS. 2009;95(16).
Albon, C., Weddemann, A., Auge, A., Meissner, D., Rott, K., Jutzi, P., & Hütten, A. (2009). Number sensitive detection and direct imaging of dipolar coupled magnetic nanoparticles by tunnel magnetoresistive sensors. APPLIED PHYSICS LETTERS, 95(16).
Albon, C., Weddemann, A., Auge, A., Meissner, D., Rott, K., Jutzi, P., and Hütten, A. (2009). Number sensitive detection and direct imaging of dipolar coupled magnetic nanoparticles by tunnel magnetoresistive sensors. APPLIED PHYSICS LETTERS 95.
Albon, C., et al., 2009. Number sensitive detection and direct imaging of dipolar coupled magnetic nanoparticles by tunnel magnetoresistive sensors. APPLIED PHYSICS LETTERS, 95(16).
C. Albon, et al., “Number sensitive detection and direct imaging of dipolar coupled magnetic nanoparticles by tunnel magnetoresistive sensors”, APPLIED PHYSICS LETTERS, vol. 95, 2009.
Albon, C., Weddemann, A., Auge, A., Meissner, D., Rott, K., Jutzi, P., Hütten, A.: Number sensitive detection and direct imaging of dipolar coupled magnetic nanoparticles by tunnel magnetoresistive sensors. APPLIED PHYSICS LETTERS. 95, (2009).
Albon, C., Weddemann, A., Auge, A., Meissner, D., Rott, Karsten, Jutzi, Peter, and Hütten, Andreas. “Number sensitive detection and direct imaging of dipolar coupled magnetic nanoparticles by tunnel magnetoresistive sensors”. APPLIED PHYSICS LETTERS 95.16 (2009).
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