M91 FastHall™ Measurement Controller


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The MeasureReady™ M91 FastHall™ measurement controller is a revolutionary, all-in-one instrument that delivers significantly higher levels of precision, speed, and convenience to researchers involved in the study of electronic materials.

Featuring Lake Shore’s patented* new FastHall measurement technique, the M91 fundamentally changes the way the Hall effect is generated and measured by eliminating the need to switch the polarity of the applied magnetic field during the measurement. This breakthrough results in faster and more accurate measurements, especially when using high field superconducting magnets or when measuring very low mobility materials.

*Protected by US patent number 9797965. Other patents pending.


Features

  • Hall analysis including calculation of derived parameters for van der Pauw and Hall bar samples
  • FastHall technology eliminates the need for magnetic field reversal when measuring van der Pauw samples
  • Traditional DC field Hall measurement (field reversal required)
  • Manual step-by-step operation for full parameter control
  • Automatic optimization of excitation values and measurement range
  • Extends mobility range down to 0.001 cm2/V s, without using AC field techniques
  • High resistance option enables measurement of samples >10 MΩ, up to 200 GΩ
  • Derived parameter calculations with propagated errors
  • Operation over simple SCPI command interface or in conjunction with MeasureLINK-MCS software
  • Digital and analog I/O for simplifying integration and data gating
  • 3-year standard warranty

Measurement applications

  • Hall voltage
  • Resistance/resistivity (four-contact in-line probe and van der Pauw)
  • Magnetoresistance
  • Hall coefficient
  • Hall mobility
  • Anomalous Hall effect (AHE)
  • Carrier type/concentration/density

A new approach to Hall measurement

FastHall provides a substantial time saving as opposed to traditional Hall systems

FastHall vs AC field Hall vs DC field Hall mobility chart


A convenient, single instrument

Traditional Hall effect measurement systems (HMS) provide basic electrical measurement instrumentation combined with a generic switch unit to measure sample resistivity and Hall voltages, but must rely on separate PC-based software to perform pre- and post-processing calculations in order to ultimately derive the physical parameters of carrier type, carrier concentration, mobility, and the Hall coefficient that researchers need to know.

The MeasureReady™ M91 FastHall™ measurement controller combines all of the necessary HMS functions into a single instrument, automating and optimizing the measurement process, and directly reporting the desired parameters. Adding HMS capabilities to any research platform has never been easier.

MeasureReady™ M91 FastHall™ measurement and control sequence


Others' approach vs. the FastHall™ approach

other Hall system components versus the FastHall controller


More about the M91

M91 measurement applications