Van der Pauw measurment- source unit

  • Context: Undergrad 
  • Thread starter Thread starter madhusoodan
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    Measurment Source Unit
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Discussion Overview

The discussion revolves around the search for suitable source measure units for studying the electrical behavior of thin films, focusing on low-budget options for applying voltage and measuring current in the micro to milliamp range.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant seeks recommendations for a low-budget source measure unit suitable for applying a few volts and measuring current in the micro to milliamp range.
  • Another participant suggests looking for inexpensive devices labeled as "microampere meter" or "milliampere meter" found on online marketplaces.
  • A different participant proposes the use of a lock-in amplifier to apply a small AC current through a shunt resistor and measure the resulting AC voltage across the sample.

Areas of Agreement / Disagreement

Participants present various suggestions without reaching a consensus on the best option for a source measure unit.

Contextual Notes

Participants do not specify the exact requirements or limitations of the measurement setup, such as the specific characteristics of the thin films being studied or the desired accuracy of measurements.

Who May Find This Useful

Researchers or students interested in measuring electrical properties of thin films, particularly those with budget constraints.

madhusoodan
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I wanted to study electrical behavior of thin films. Can anybody suggest me suitable source measure unit please?
(also of low budget)
Power supply: Voltage (few volts)
measurement: current (micro- milliamps)
 
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I've found some cheap devices on amazon looking after "microampere meter" or "milliampere meter"
 
Thanks . there are many as youmentioned
 
You could use a lock-in amplifier to apply a small AC current using a shunt resistor and measure the AC voltage across the sample.
 

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