DC Field Measurement Techniques

Below is a list of measurement techniques available at the DC Field Facility. For a list of all techniques available across all MagLab facilities, please go to our main Measurement Techniques page.

AC Electrical Conductivity in DC Fields

The DC Field Facility has the capability to measure low resistances samples in continuous fields up to 45 T. Most of the standard laboratory electronics that users have experience with for lower field measurements are available at the MagLab, including lock-in amplifiers, current sources and pre-amplifiers.

AC Magnetic Susceptibility in DC Fields

AC magnetic susceptibility measures magnetic moment of a sample which is exposed to an oscillating external magnetic field.

Capacitance Dilatometry in DC Fields

A capacitive dilatometer measures a change of sample dimension by monitoring the capacitance between two parallel plates.

Contactless Conductivity in DC Fields

The user can place small samples into an inductor (i.e., coil) of an LC tank circuit oscillating at a resonant frequency.

DC Electrical Conductivity in DC Fields

Electrical transport measurements can be carried out in temperatures as low as 20 mK and magnetic fields up to 45 T by either AC or DC methods.

Dielectric Measurements in DC Fields

Dielectric capacitance measures capacitance and dissipation of a bulk or thin film sample.

Electron Paramagnetic Resonance / Electron Spin Resonance in DC Fields

EPR and ESR are two names of the same technique (EPR is preferred by the chemists and biologists while ESR is a favorite of physicists) which depends on detecting transitions between the magnetic field-split spin sublevels in systems with unpaired electrons, in particular, in paramagnets.

Heat Capacity in DC Fields

Specific heat of a material is a measure of heat necessary to raise the temperature of a given amount of material, typically a gram or a mol, by 1 Kelvin.

High Current Measurements in DC Fields

High currents measurements in the MagLab are used mainly for characterization/testing of superconducting materials.

High Pressure in DC Fields

Various pressure cells have been developed to address user needs, including large volume piston-cylinder cells with a maximum working pressure of 2.5 GPa and diamond anvil cells (DACs) that reach pressures greater than 20 GPa for optical measurements and 10 GPa for measurements that require introducing electrical leads.

Infrared / Terahertz Magneto Optics in DC Fields

Bruker FTIR spectrometers are coupled to SCM3 and resistive magnet in cell 8.

Low-temperature Condensed Matter NMR in DC Fields

The lab boasts a Condensed Matter NMR Group dedicated to NMR research at the highest possible fields over a wide temperature range.

Microwaves in DC Fields

Wideband microwave measurement capacity to 40 GHz.

Piezo Dilatometry in DC Fields

Phase transitions that produce small length changes (even on the order of nanometers) due to thermal expansion or magnetostriction can be resolved by making contact between the tip of a miniature piezo-resistive cantilever and a sample.

Pulse-Echo Ultrasound in DC Fields

In the pulse-echo ultrasonic technique, an ultrasound wave is excited and detected by two identical piezoelectric transducers (transmitter and receiver), which are glued to polished opposite sides of a sample.

Raman Magneto-Spectroscopy in DC Fields

In a Raman scattering experiment, a specimen is shined with laser light of a known frequency (energy) and polarization, and the scattered light is collected and analyzed for frequency and polarization.

Resonant Ultrasound Spectroscopy in DC Fields

The use of mechanical resonances to determine the elastic moduli of materials of interest to condensed matter physicists, engineers and materials scientists is steadily evolving. With the massive computing capability found in an ordinary personal computer, it is now possible to find all the elastic moduli of low-symmetry solids using sophisticated analysis of a set of the lowest resonances.

Surface Acoustic Waves in DC Fields

The contactless Surface Acoustic Wave (SAW) technique is implemented to probe the high-frequency conductivity in low dimensional (2D) structures, by measuring the SAW attenuation and velocity.

Torque Magnetometry in DC Fields

A torque magnetometer is one of the most sensitive magnetic property measurement devices.

Ultrafast Magneto-Optics in DC Fields

This technique utilizes a streak camera in order to measure photoluminescence lifetimes with a minimum duration of 2 ps.

UV / Visible / NIR Magneto-Optics in DC Fields

The Magneto-optical Kerr probe provides the laboratory with a unique apparatus to measure properties of ultra-thin magnetic films and multilayers at high magnetic fields and cryogenic temperatures (2K-325K).

Vibrating Sample Magnetometry in DC Fields

A vibrating sample magnetometer (VSM) is used to measure DC magnetic susceptibility and DC magnetization. The VSM utilizes the Faraday’s Law to measure absolute magnetic moment of a magnetic sample.

X-ray alignment of single crystals

The X-ray alignment is sample preparation technique that is done prior to putting single crystals into the magnets.

X-ray diffractometry in DC Fields

An X-ray diffraction instrument is available at the 25 Tesla Florida Split Coil Magnet at the NHMFL and allows studying magnetostructural transformations in the temperature range ~10 K - 300 K.