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The DynoMag system and The High Frequency (HF) AC susceptometer

AC susceptometry gives information on how fast magnetization is building up in a material. An excitation magnetic field is applied over the sample and the in-phase and out-of-phase susceptibility is measured in a frequency range. Different types of magnetization processes can be detected with AC susceptometry for instance in magnetic nanoparticle systems such as internal Néel relaxation or Brownian particle relaxation. The magnetization processes create a specific response in the AC susceptibility measurement. In the field of magnetic nanoparticles and AC susceptometry we have a large collaborate international network. At RISE, we research, develop and manufacture ACS systems described below that are sold internationally. In all ACS systems software is included that fits experimental data to several different models including both Brownian and Néel relaxation.

Cause

The DynoMag System

The DynoMag system is a portable easy to use AC susceptometer for measuring the dynamic magnetic properties of liquids, powders and solids at room temperature. The excitation frequency range is from 1 Hz up to 500 kHz with a resolution in volume susceptibility 1·10-5 (SI units) at 1 kHz and a excitation field amplitude of 0.5 mT.

Typical application areas:

  • AC susceptibility measurements of solids, powders and liquids
  • Dynamic magnetic analysis in the field of magnetic nanoparticles (MNPs)
  • Determine the size distribution of magnetic nanoparticles using an algorithm included in the software of the DynoMag (including both Brownian and Néel relaxation)
  • Study stability and possible particle clustering during for instance bio-functionalizing of MNPs
  • Follow the binding reactions of biomolecules to MNPs
  • Measurement of magnetic properties in geophysics

 

The DynoMag HF system

The DynoMag HF system is an AC susceptometer for measuring the dynamic magnetic properties of liquids, powders and solids at room temperature. The excitation frequency range is from 25 kHz up to 10 MHz with a resolution in volume susceptibility 4.10-5 (SI units) at 100 kHz and a excitation field amplitude of 30 µT.

Typical application areas:

  • AC susceptibility measurements of solids, powders and liquids at frequencies up to 10 MHz
  • Determine the size distribution of magnetic nanoparticles using an algorithm included in the software of the DynoMag (including both Brownian and Néel relaxation)
  • Dynamic magnetic analysis in the field of magnetic nanoparticles (MNPs)
  • Detect the Néel relaxation of single-core particle systems
  • Measurement of magnetic properties in geophysics

 

The Low Temperature High Frequency AC Susceptometer

In collaboration with Dr Sean Giblin’s research team at Cardiff University we have developed a low temperature high frequency (LTHF) ACS system integrated in a Quantum Design PPMs system. This makes it possible to carry out high frequency ACS sensing also at low temperatures and at high static magnetic fields (paper in Review of Scientific Instruments).

Method

Construction is carried out in our labs at RISE in Göteborg.

Deliveries

Delivery of the the DynoMag system or the DynoMag HF system including manual, calibration sample and sample vials.

Ordering

Contact the contact persons below

Facts

Service

The DynoMag system and The High Frequency (HF) AC susceptometer

Innovation area

Digitalisation, Digital health, Electronics, Formulated products, Calibration and control, Chemical processes and products, Chemical and biological analysis, Material transition, Generic metrology and measurement technology, Preventive healthcare

Price

Price on tender

Delivery time

The DynoMag system: within 3 months after order. The DynoMag HF system: within 6 months after order.

Preparations

No preparation needed

Jakob Blomgren

Contact person

Jakob Blomgren

Senior Scientist

+46 10 228 41 54
jakob.blomgren@ri.se

Read more about Jakob

Christer Johansson

Contact person

Christer Johansson

Senior Expert

+46 10 228 41 82
christer.johansson@ri.se

Read more about Christer