TITLE

Magnetorelaxometry of magnetic nanoparticles in magnetically unshielded environment utilizing a differential fluxgate arrangement

AUTHOR(S)
Ludwig, F.; Mäuselein, S.; Heim, E.; Schilling, M.
PUB. DATE
October 2005
SOURCE
Review of Scientific Instruments;Oct2005, Vol. 76 Issue 10, p106102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A magnetorelaxometry system based on a differential fluxgate arrangement is presented. Compared to the single fluxgate setup, the use of two fluxgate magnetometers increases the relaxation signal from the sample by a factor of 2, the signal-to-noise ratio by a factor √2, and allows one to perform magnetorelaxation measurements without any magnetic shielding. For a sample with superparamagnetic Fe3O4 nanoparticles and a volume of 150 μ1, 100 nmol Fe could be detected, limited by the intrinsic noise of the fluxgate sensors.
ACCESSION #
18737950

 

Related Articles

  • A highly automatic measurement system for three orthogonal magnetic moments of a permanent... Hwang, C.S.; Shuting Yeh; Teng, P.K.; Uen, T.M. // Review of Scientific Instruments;May96, Vol. 67 Issue 5, p1741 

    Reports on the design and construction of a highly automatic system with a three-angle rotation mechanism to measure several thousand permanent magnet blocks. Algorithm for data analysis; Measurement system; System calibration and precision; Accuracy of the system.

  • Development of Fluxgate Magnetometers Based on Fe61Co19Si5B15 amorphous ribbons. Vaitsi, Sotiria // Key Engineering Materials;2014, Vol. 605, p697 

    This paper deals with the characterization of fluxgate magnetometers that adopt a Fe61Co19Si5B15 ribbons as magnetic core. The experimental characterization concerned the dependence of Δt and ΔV according to the magnetic field Hdc. The change of the field (variable input) held by...

  • Evaluation of cancellation coil for precision magnetic measurements with strong prepolarization field inside shielded environment. Hwang, Seong-min; Kim, Kiwoong; Seok Kang, Chan; Lee, Seong-Joo; Lee, Yong-Ho // Journal of Applied Physics;Apr2012, Vol. 111 Issue 8, p083916 

    Many precision magnetic measurements can benefit significantly from or even require strong prepolarization fields (Bp) and magnetically shielded environments. We describe here in detail a cancellation coil (CC) which can neutralize the Bp on the electrically conductive shield walls that may...

  • A quantitative model for the nonlinear response of fluxgate magnetometers. Geiler, A. L.; Harris, V. G.; Vittoria, C.; Sun, N. X. // Journal of Applied Physics;4/15/2006, Vol. 99 Issue 8, p08B316 

    An analytical nonlinear hysteresis model was developed to describe the hysteresis loops of different magnetic materials, which was capable of fitting Permalloy films as an example. As a case study this model was applied in the sensitivity analysis of the fluxgate magnetometers where accurately...

  • Detection of Magnetic Material in Soil Subsurface using Electromagnetic Induction Method Based on Fluxgate Sensor. Djamal, Mitra; Indrasari, Widyaningrum; Ramli; Srigutomo, Wahyu // Key Engineering Materials;2016, Vol. 675/676, p494 

    An instrument based on electromagnetic induction method for detecting magnetic material in soil subsurface has been developed. The instrument consists of a signal generator, an amplifier, a transmitter, receivers, detectors and a display. A coil is used as transmitter. As receiver and also...

  • Apparatus with permanent magnet flipper for magnetic circular dichroism absorption measurements. Muto, Sadatsugu; Kagoshima, Yasushi; Miyahara, Tsuneaki // Review of Scientific Instruments;Jan1992, Vol. 63 Issue 1, p1470 

    An apparatus with permanent magnet flipper was designed and constructed to study magnetic circular dichroism (MCD) of various magnetic materials. The permanent magnet flipper is similar to a single period of undulator magnets but has two holes to allow the incident light to go through. The...

  • Fundamental limits to magnetic-field sensitivity of flux-gate magnetic-field sensors. Koch, R. H.; Deak, J. G. // Applied Physics Letters;12/13/1999, Vol. 75 Issue 24, p3862 

    Determines the theoretical limit of magnetic-field sensitivity of the flux-gate magnetometer. Model for the white noise of a flux gate; Fundamental dynamics of the magnetic material forming the flux-gate core.

  • Low-Noise Permalloy Ring-Cores for Fluxgate Magnetometers. Miles, David M.; Ciurzynski, Miroslaw; Barona, David; Narod, B. Barry; Bennest, John R.; Kale, Andy; Lessard, Marc; Milling, David K.; Larson, Joshua; Mann, Ian R. // Geoscientific Instrumentation, Methods & Data Systems Discussion;2019, p1 

    Fluxgate magnetometers are important tools for geophysics and space physics providing high precision magnetic field measurements. Fluxgate magnetometer noise performance is typically limited by a ferromagnetic element that is periodically forced into magnetic saturation to modulate, or gate, the...

  • A Novel Design of Fluxgate Magnetometer: An Insect like Configuration. Topal, Uğur; Sözeri, Hüseyin // Journal of Superconductivity & Novel Magnetism;Feb2015, Vol. 28 Issue 2, p711 

    In the present work, we propose a novel design of the fluxgate magnetometer which utilizes the detection of ultra-low DC fields down to (even less) 10 μOe. Measurement point has four eyes, like insects, with the diameter of each having 100 μm. It means that the magnetometer can be used for...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics