Superconductivity was discovered in 1911, when Kamerlingh Onnes found that the electric resistance of mercury dropped to zero at cryogenic temperatures. The so called transition temperature when a conductor becomes superconducting depends on the material used. For the next 75 years, the transition temperatures were just in the 10 to 20 K range.
In the present setup, the transition temperature of high temperature superconductor YBCO or BSCCO is measured. A probe chamber is used for liquid nitrogen in which the superconducting probe (sample) is cooled to below its critical temperature of approximately 93 K or -180 °C. The superconductivity probe is designed precisely based on four- point measurement for resistivity, the end points for fixed current and middle points for voltage drop. A temperature sensor is also attached on the surface of the sample. The voltage drop across the sample is measured as a function of the sample temperature using the voltage sensor.

Contents:

• Superconductivity Probe SU002
  • 
    SPECIFICATIONS Sample : BSCCO or YBCO
    Contact : Four point probe devices
    Thermocouple : Type 'T' (Copper-Constantan)
    Sample Placing : Rugged Brass Casings
    Hosing : Acylic
    Connection : 4mm plug
    
• Superconductivity Unit SU001
  • 
    SPECIFICATIONS Input Voltage : 220V, 50Hz AC
    Constant Current Source : 150mA, 4mm Socket
    Voltage Input terminal for Superconductor : 4mm Socket
    Voltage Output terminal for Superconductor : 4mm Socket with gain & offset pot
    Temperature Input terminal for Superconductor : 4mm Socket
    Temperature Output terminal for Superconductor : 4mm Socket, Calibrated on room temperature.
    
• Interface
• Probe Chamber SU003
  • 
    SPECIFICATIONS Dimension : 150mm x 100mm
    Inner material : Thermocol
    Outer material : Wooden
    This chamber is designed for liquid nitrogen.
    
• Voltage Probe
• Meissner Effect Sample SU004
  • 
    SPECIFICATIONS Disks : 1" diameter
    Material : YBCO or BSCCO
    Magnet : Rare earth
    Tweezers : Non-magnetic
    

• Ring Launcher
• Microwave Optics System
• Field Lines and Equipotential Lines
• Dielectric Constant
• Permeability & Permittivity of Air Experiments
• Faraday's Law & Induced E.M.F.
• Magnetic Field in Helmholtz Coil
• Biot Savart's Law
• Magnetic Field along the Axis
• Superconductivity Experiment Kit
• Dia-,Para-, and Ferromagnetism
• Study of BH-Curve with Deep
• Quincks Tube Method