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

AC susceptometry (ACS) 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 measured with ACS.

This service is also relevant in: Energy and electrification, Materials and durability

Service details

Service
The DynoMag system and The High Frequency (HF) AC susceptometer
Price
Price on tender
Delivery time

The DynoMag system: within 6 months after order. The DynoMag HF system: within 9 months after order.

More information
DynoMag manual (pdf, 3.12 MB)
DynoMag papers (pdf, 589.44 KB)
The LTHF ACS system paper in arXiv (pdf, 550.36 KB)

Application of interest

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Jakob Blomgren

Senior Scientist
+46 70 915 18 48 Read more about Jakob

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Christer Johansson

Senior Expert
+46 72 723 33 21 Read more about Christer

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Purpose

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 Prof. 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.

Related

Article

DynoMag – a magnetic measuring system for many applications

To be able to reliably characterize nanostructured materials, including magnetic nanoparticles (MNP), is crucial for standardizing MNP systems and the application of specific analysis methods. The DynoMag system, developed at the RISE Magnetic Sensor Systems Lab in Gothenburg, offers a reliable and integrated magnetic measurement system for biodetection using MNPs and rheological measurements.
Medtech / Article

DynoMag changes the game at the University of Florida

At the Rinaldi-Ramos Research Laboratory, University of Florida, research focuses on the behavior and biomedical applications of magnetic nanoparticles in time-varying magnetic fields, such as magnetic particle imaging and nanoscale thermal therapy. This interdisciplinary research encompasses theory and simulations, nanoparticle synthesis and characterization, and evaluation in biological environments. They needed a system to characterize the behavior and mobility of particles and complexes in fluid suspensions, and they found it in the DynoMag system.