Hall Effect Apparatus

When a conductor through which current is flowing, is placed in the magnetic field, a potential difference is generated between two opposite edges of the conductor in the direction mutually perpendicular to both the field and the conductor. This potential developed is Hall voltage & this phenomenon is called Hall effect.
In the present setup, the crystal mount on PCB is placed perpendicular to the magnetic pole pieces. Magnetic field is produced by electromagnet operated by 0-20V, 5A power supply. Field intensity measured by digital gauss meter with gauss probe. A constant current (0-20mA) is passed through the crystal and induced hall voltage is measured on digital display.

Features:

• Dedicated constant current source with Hall Voltage Display, No external meter is rquired.
• Compact Electromagnet arrangement with U-core and yoke produce magnetic field upto 8K Gauss.
• Stackable DC Regulated Power Supplies with short circuit protection and safety Sockets.
• Power Supplies can be used as constant current and constant voltage source.
• Digital Gauss meter with 2k & 20k Gauss capacity and resoltion 1 and 10 Gauss.

Objectives:

• To determine Hall Voltage (p or n type).
• To determine Hall Coefficient.
• To determine the type of Charge carrier .
• To determine Charge Density of carriers.
• To determine the Resistivity of a given sample.
• To determine the mobility of charge carriers.
• To determine the Hall angle .

Technical Data:

• Power Supply : 0-20V DC, 0-5 A, Voltage resolution 0.1V, Current Resolution 0.1 A, Display 3½ digit LED, Primary fuse 2 A
• Digital Gauss Meter : Range 2k & 20kG, Sensor In As, Resolution 1G & 10 G at 2k & 20k G, Offset By Potentiometer to set ZERO.
• Electro magnet : Coils 500 T, Current 7A (Max.), 4mm safety socket, Ferromagnetic “U” core, 150 x 130mm(LxH),40 x 40mm cross section, I Core L=150mm, 40x40mm cross section, Field Capacity 1T(Max.)
• Sample : P type Ge Wafer, Size 6 x 7 x 0.5mm, Resistivity 1~ 10 Ω cm, Orientation <100> Trim pot offset , 4mm safety socket.
• Current Source : 0-19.99 mA DC, Accuracy 0.01 mA, Resolution 10 micro ampere, Display 3½ digit LED
• Voltage meter : 0-199.9 mV, Resolution 0.1mV, display 3½ digit LED,

Scope of Delivery:

• 1 Hall Effect apparatus
• 1 Dc Regulated Power Supply
• 1 Constant current source
• 1 Digital Gauss meter
• 1 Liner(Screw Driver)
• 3 Flexible Plug leads 100cm, Black
• 3 Flexible Plug leads 100cm, Red
• 1 Flexible Plug leads 50cm, Yellow
• 3 Power Cord
• 1 P-Type Ge crystal PCB
• 1 N-Type ge Crystal PCB(Optional)