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The Hall Effect

The Hall Effect

Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.

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Related Experiment Video

Updated: May 21, 2025

Optimization, Test and Diagnostics of Miniaturized Hall Thrusters

Optimization, Test and Diagnostics of Miniaturized Hall Thrusters

Published on: February 16, 2019

Advancing precision in Hall effect through localized heating with a compact design.

Dinesh Kumar Kedia¹, Navita Jakhar¹, Surjeet Singh¹

¹Department of Physics, Indian Institute of Science Education and Research, Dr Homi Bhabha Road, Pune 411008, India.

The Review of Scientific Instruments

|March 21, 2025

Summary

A new automated Hall measurement setup offers precise temperature control up to 750 K and high sensitivity for diverse materials. This versatile system enables reliable characterization of semiconductors and thermoelectrics for advanced material research.

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Last Updated: May 21, 2025

Optimization, Test and Diagnostics of Miniaturized Hall Thrusters

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Published on: February 16, 2019

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

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Published on: January 21, 2016

Area of Science:

Materials Science
Condensed Matter Physics
Electrical Engineering

Background:

Accurate characterization of charge carrier properties is crucial for developing advanced materials.
Existing Hall measurement systems may have limitations in temperature range, sensitivity, or sample versatility.

Purpose of the Study:

To develop and validate a versatile, fully automated Hall measurement setup.
To achieve precise temperature control and high sensitivity across a wide range of materials and operating conditions.

Main Methods:

A compact, automated sample holder with localized heating and minimal heat loss for stable temperatures up to 750 K.
Phase-sensitive lock-in detection and electromagnetic shielding for nanovolt Hall signal measurements.
Adjustable pressure-point contacts within a controlled atmosphere quartz tube for diverse sample geometries.

Main Results:

The setup operates reliably between room temperature and 750 K in magnetic fields up to ±10 kOe with temperature stability better than ±10 mK.
Achieved high sensitivity enabling measurements on samples with carrier concentrations ranging from 10^14 cm^-3 to 10^21 cm^-3.
Successfully characterized diverse materials including germanium, half-Heusler semiconductors, and superionic thermoelectrics.

Conclusions:

The developed Hall measurement setup is versatile, reliable, and offers high performance for a broad spectrum of materials.
The system's precision and automation facilitate efficient and accurate characterization of thermoelectric and semiconductor properties.
The results demonstrate good agreement with commercial systems, validating the setup's capabilities.