Magnetorelaxometry using Improved Giant MagnetoResistance Magnetometer

Magnetorelaxometry using Improved Giant MagnetoResistance Magnetometer

Magnetorelaxometry measurements on immobilized superparamagnetic magnetite (Fe 3O 4) nanoparticles in freeze-dried samples using a low-cost Improved Giant MagnetoResistance Magnetometer (IGMRM) are presented. Fits to relaxation phenomenological model based on Moment Superposition Model (MSM) are use...

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Veröffentlicht in:Sensors and actuators. A. Physical. 2010-05, Vol.159 (2), p.184-188
Hauptverfasser: Denoual, M., Saez, S., Kauffman, F., Dolabdjian, C.
Format: Artikel
Sprache:eng
Schlagworte:
Actuators
Amplitudes
Confidence intervals
Electromagnetism
Engineering Sciences
Giant magnetoresistance
Iron
Magnetite
Nanoparticles
Sensors
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Zusammenfassung:Magnetorelaxometry measurements on immobilized superparamagnetic magnetite (Fe 3O 4) nanoparticles in freeze-dried samples using a low-cost Improved Giant MagnetoResistance Magnetometer (IGMRM) are presented. Fits to relaxation phenomenological model based on Moment Superposition Model (MSM) are used to extract the characteristic values. Concentrations of iron down to 3.85 μmol are identified in a 150 μl volume from experimental measurements. Also, the extracted amplitude characteristic value confidence intervals associated to measurements and detection performances are given.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2010.03.029