Hall Effect Systems

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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

Features of the 8400 Series

  • Ideal for variable temperature measurement and mobilities from 1 to 106 cm2/V s
  • Optional AC field extends mobility measurement range down to 10-3 cm2/V s
  • Maximum DC fields to 1.67 T (8404) and 2.25 T (8407)
  • Optional AC fields to 1.18 T (8404) and 1.31 T (8407)
  • Standard resistance range of 0.5 mΩ to 10 MΩ
  • High resistance option widens range to 200 GΩ
  • Low resistance option significantly reduces resistance noise floor
  • Temperatures from 15 K to 1273 K

Features of the Model 8425

  • A complete Hall effect measurement system using device probing under vacuum in a probe station
  • Supports a range of DC field Hall measurements—measure mobility on wafer-scale materials and structures as a function of temperature and field
  • DC fields to 2 T and resistances from 0.5 mΩ to 100 GΩ
  • Vary temperatures from 10 K to 400 K using closed-cycle refrigerator—no cryogen required
  • Includes intuitive 8400 Series software for easy system operation, data acquisition, and analysis
  • Supports exporting of data for multi-carrier analysis
  • 3-year standard warranty

Features of the Model 9700A

  • Standard sample resistance ranges from 0.04 mΩ to 200 GΩ
  • Fields to 9 T
  • Temperatures from 2 K to 400 K
  • Quantitative Mobility Spectrum Analysis (QMSA®) software resolves individual carrier mobilities and densities in multi-carrier devices
  • Anomalous Hall Effect measurements for spintronics including dilute magnetic semiconductors and ferromagnetic metallic alloys