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Hall Effect Measurement Machine

/Hall Effect Measurement Machine
  • Hall Effect Measurement Machine

Hall Effect Measurement Machine, Hall Effect Measurement System
Introduction

The electrical transport test system is one fully automated test system, which intergrates Hall effect, magnetoresistance, IV characteristics test in one machine. This system takes some problems which users often ignore, such as instrument configuration, circuit wiring (including room temperature and low-temperature wiring) into consideration, selects the Keithley electrical measuring instruments. The magnetic field can adopt electromagnet or liquid helium superconducting magnet based on user’s requirement, equipped the smart measurement sample rod, plus a special fully automated test software, allowing users to quickly and easily measure sample and obtain accurate and reliable data. Addition, there are a variety of low-temperature options, and can transform according to the user’s existing instrumentation and the special requirements of the software. hall effect measurement system is a powerful tool for the resaearch of materials’ electrical transport properties.

Basic configuration:
U.S. Keithley instrumentation

System
(resistance range)
Source meter
Voltmeter
Ammeter
Host computer
Matrix card
Electrometer
Commu
nication Interface
2400
6220
2700
2182A
6485
7001
7709
7012
7152
6514
488B
Standard
(10mΩ-10MΩ)
1
1
1
1
High sensitivity
(0.1mΩ-10MΩ)
1
1
1
1
1
High voltage and impedance
(0.1mΩ-100GΩ)
1
1
1
1
2
2
1

 

Magnetic part

Low temperature portion (optional)

Temperature Range
Cooling body
Temperature control device
80~450K
Liquid nitrogen thermostat
TC202
4~500K
Cycle refrigerator
TC202
1.6~325K
Cryogenic low temperature system
TC202
45~325K
CTI small refrigerator
TC202

Main features:
Using plug-sample cards, easy to install;
One standard configuration can simultaneously measure two samples, 4 samples can be measured simultaneously by adding optional devices;
Resistance measurement range: 0.1mΩ~100GΩ(High voltage and impedance system);
Different Hall effect and resistance measurements under different current and magnetic field;
Testing and calculation process performed automatically by the software, which gives the intermediate data and the curve at the same time.It will save you a lot of time;
System provides high stability of the magnetic field for a long time,zero magnetic field can be smoothed;
Electromagnet power supplybuilt in precision Gauss Meter, high field control speed;
Choosing low-temperature device,Hall effect and resistance measurements can be performed at different temperatures.
Testable material:
Semiconductor materials: SiGe, SiC, InAs, InGaAs, InP, AlGaAs, HgCdTe and Ferrite materials, etc.
Low impedance material: metal, transparent oxide, weak magnetic semiconductor materials, TMR materials, etc.
High impedance material: semi-insulating GaAs, GaN, CdTe,etc.
Basic function:
Measurement of Hall Effect, magnetic resistance, curves of I-V and R-T .
Parameters to be measured: Hall Effect- sheet resistance, resistivity, Hall coefficient, conductivity type, Hall mobility, carrier concentration;
Magnetic resistance effect: R, △R, (△R/R)%, (△R/R0)%
I-V curve: I-V curves at different temperature and magnetic field.
R-T curve: Under fixed magnetic field, the curves for resistance changes at different temperature.
R-H curve: Under fixed temperature, the curves for resistance changes at different magnetic field.
Main technical indexes:
Sample size
Small size sample card: 12*12 mm2
Large size sample card: 50*50 mm2
Probe sample card: 1×1mm2~30×30mm2
Sample measurement method
Hall effect samples: Si, GaAs, ect.
Resistance and I-V samples: 4 wire or 6 wire method

Temperature environment (optional)
No liquid helium superconducting magnet system, 1.6K~325K;
Liquid nitrogen thermostat options:
Standard liquid nitrogen thermostat, 80K~325K;
High temperature liquid nitregen thermostat, 80K~500K;
Cycle refrigerator options:
Standard 4K refrigerator system, 4K~325K;
High temperature 4K refrigerator, 4K~700K;
Standard 10K refrigerator system, 10K~325K;
High temperature 10K refrigerator, 10K~800K;
Minisize refrigerator system, 45K~325K;
Electrical properties
Under the following typical test conditions:

Sample power consumption less than 1mV, under this condition, let excitation reach the maximum recommended current and voltage in system configuration;
Sample temperature 295K;
Sample seat without leak current;
The reistance of each test lead 25Ω;
Voltage usage effectiveness of measurement electrical resistivity (V_out/V_in) should be 0.1 approx. for Vanderbit sample and should be 0.5 approx. for hall sample;
Sample shape correction factor 1;
Magnetic field and sample thickness measurement uncertainty should be within 1%;
Magnetic field/sample thickness should be 1T/mm, note the measured maximum carrier concentration is approximately proportional to this value, so stronger magnetic field and thicker sample could improve the measurement range.  PML-100 Super Strong Neodymium Lifter Magnet
System
Standard
Current source
±100pA~±0.1A
Voltage source
±0.1uV~±30V
Current
±100pA~±100mA (min. resolution 100pA)
Voltage
±0.1uV~±30V (min. resolution 0.1uV)
Max. resistance
10MΩ
Min. resistance (VDP)
40mΩ
Min. resistance(HB)
10mΩ
Max. carrier concentration
1.0E+18

More
  • Customized is Available
  • Affordable price
  • Quality guaranteed
  • T/T or L/C accepted
  • Other payment accepted
  • Fast shipping, Worldwide delivery
  • 24-Hours excellent customer service
  • Offer free magnetic solution
  • Bulk discounts for larger orders

Product Range

Imperial
Metrics
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