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JH60D-Low Temperature Hall Effect Test System

The Hall effect tester consists of electromagnet, electromagnet power supply, high precision constant current source, high precision voltmeter, Hall effect sample holder, standard sample, high and low temperature Dewar, temperature controller and system software.

产品详情

Hall Effect Tester - Low Temperature Type

Product Description:

The Hall effect tester consists of electromagnet, electromagnet power supply, high precision constant current source, high precision voltmeter, Hall effect sample holder, standard sample, high and low temperature Dewar, temperature controller and system software. The JH10 effector specially developed for this instrument system integrates a constant current source, a six-and-a-half-digit microvoltmeter and a complex switching relay-switch for Hall measurement, which greatly simplifies the connection and operation of the experiment. JH10 can be used alone as a constant current source and a microvoltmeter.

It is used to measure important parameters such as carrier concentration, mobility, resistivity, and Hall coefficient of semiconductor materials. These parameters must be controlled in advance to understand the electrical properties of semiconductor materials. Therefore, the Hall effect test system is to understand and study semiconductor devices. It is a must-have tool for the electrical properties of semiconductor materials. The experimental results are automatically calculated by the software, and the Bulk Carrier Concentration, Sheet Carrier Concentration, Mobility, Resistivity, and Hall Coefficient can be obtained at the same time. Coefficient), magnetoresistance, etc.

Technical indicators：

Physical Parameters	carrier concentration	510¹²～5110²⁰cm^-3
	mobility	0.1～10⁸cm²/volt*sec
	Resistivity range	510^-5～510²Ω.cm
	Resistance range	10 m Ohms～ 6MOhms
	Hall coefficient	±110^-2～±1106cm³/C
Magnetic Field Environment	Magnet Type	variable electromagnet
	Magnetic field size	Maximum magnetic field 20000Gs when N, S distance is 10mm;13000 Gauss max at 20mm N, S spacing Maximum magnetic field 10000 Gauss when N, S spacing 30mmUniformity area: 10mm diameter at 60mm spacing, uniformity range 1%
	Minimum resolution	0.1GS
	Magnetic field range	0-1T
	Optional magnetic field environment	Electromagnets with relevant magnetic sizes can be customized according to customer needs
Electrical Prameters	Sample current	0.05uA～50mA (adjust 0.1nA)
Electrical Prameters	Measuring voltage	0.1uV～30V
Temperature Environment	Temperature adjustment	0.1K
Temperature Environment	warm zone	78K-325K,4K-325K（Optional）
Testable Materials	Semiconductor material	SiGe, SiC, InAs, InGaAs, InP, AlGaAs, HgCdTe and ferrite materials etc.
	low impedance material	Graphene, metals, transparent oxides, weak magnetic semiconductor materials, TMR materials, etc.
	high resistance material	Semi-insulating GaAs, GaN, CdTe, etc.
Provide various test standard materials, various grades of silicon and gallium arsenide (different sensitivity and accuracy); computer communication with Gauss meter or data acquisition board; I-V curve and I-R curve measurement, etc.; Hall coefficient, carrier concentration and other parameters Change curve with temperature; Fully automatic test, one-key processing; Can realize continuous measurement between the same temperature difference.

System Components :

The low temperature Hall effect test system consists of electromagnet, vacuum pump, low temperature vacuum chamber, Gauss meter, constant current source, electromagnet current source, temperature controller, computer and software. Among them, the electromagnet current source provides current to the electromagnet to generate a magnetic field; the Gauss meter measures the uniform magnetic field value generated by the coil; the constant current source provides current to the sample on the one hand for Hall effect testing, and on the other hand can measure the sample voltage; The test sample is placed in a low-temperature vacuum chamber, fixed by low-temperature glue, and used as four test points; four wires are led out of the low-temperature vacuum chamber, two are connected to a temperature controller for temperature measurement and control, and the other is a low-temperature probe lead connection To the Gauss meter, there is also a Hall sample connecting line connected to the constant current source; the computer is connected to the Gauss meter, the temperature controller, the constant current source and the electromagnet current source, and the current through the tested sample is controlled by software. and magnetic field value, and obtain the measured voltage value.

Each System Parameter:

High Precision Electromagnet:

Pole diameter: 100mm;

Maximum magnetic field 20000Gs when N, S spacing is 10mm

Maximum 13000 Gauss when N, S spacing is 20mm

Maximum magnetic field 10000 Gauss when N, S distance is 30mm

Uniformity area: 10mm diameter at 60mm spacing, 1% uniformity range

Weight 110kg, including brackets and wheels

High Precision Bipolar Constant Current Power Supply

Output: ±10A ±80V power; 800W

① The output current of the power supply can be continuously changed between the positive and negative rated currents

② The current can smoothly cross the zero point, non-switching commutation

③ Four-quadrant operation of output current and voltage (suitable for inductive loads)

④ The current change rate can be set from 0.0007 to 0.3 F.S./s (F.S. is the rated maximum output current)

※ High Current Stability And Low Ripple

① Current stability: better than ±25ppm/h (standard type); better than ±5ppm/h (high stability type)

② Current accuracy: ±(0.01% set value + 1mA)

③ Current resolution: 20 bit, for example 15A power supply, current resolution is 0.03mA

④ Source effect: ≤ 2.0×10-5 F.S. (when the supply voltage changes by 10%, the output current changes)

⑤ Load effect: ≤ 2.0×10-5 F.S. (when the load changes by 10%, the output current changes)

⑥ Current ripple (RMS): less than 1mA

High Precision Gauss Meter:

Accuracy: ±0.30% of reading

Resolution: 0.01mT Range: 0-3T

Probe thickness: 1.0mm

Length 100mm digital

Rs-232 interface data reading software with GP3 probe

Gauss meter probe holder and sample holder:

All-aluminum non-magnetic conductive bracket is adjustable from 5-70mm;

Sample holder fixture (as required); 5 1 Hall effect system software can digitally adjust the magnetic field and current, test various material parameters

80K-293K high and low temperature vacuum container

TESK301 Thermostat temperature control (65k-600k)

Vacuum Pump K25 Vacuum Pump

Constant current source and test table

Constant current source range: ±50nA-±50mA;

Resolution 0.1nA continuously adjustable within the range;

High-precision voltage data acquisition instrument range 0. 1uV-30V

Accuracy: 0.01%

Built-in test matrix conversion card;

ohmic contact kits ohmic contact kits based on different materials

Introduction Of control Software:

JH60D is a one-button measurement operating system. It only needs to set a few sample parameters and the required temperature, and it can automatically measure with one button, without having to keep watch. When measuring, you only need to set the current passing through the sample, the size of the magnetic field of the magnetic field environment where the sample is located, and the thickness of the sample to measure. If you need to control the temperature, open the temperature setting to set the required temperature, and select the output power to control the temperature. The temperature control takes a short period of time (about 1min). After the temperature is stable, the measurement of various parameters at this temperature can be performed. The data can be plotted and exported to EXCEL for post-processing and use.

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