Write your name, section, and today's date in the cell below:¶

Name - Section - Date -

Synopsis¶

In this lab, we will investigate a high temperature superconductor, paying particular attention to its behavior around its critical temperature. We will follow a manual closely, so see the below for more info (which can also be accessed at https://cdn.pasco.com/product_document/4-point-kit-Experiments-manual-2.0.pdf). A video summary of the setup can be found at https://www.youtube.com/watch?v=3lm5Yqm8ZBQ&ab_channel=QuantumLevitation

There are some warnings for this lab: - Liquid nitrogen is very cold. Take care when pouring it (and e.g. don't hold the cup with your hand when pouring into the cup), and take care not to spill it on yourself. - When dipping the setup in water, keep the setup dry with the plastic bags.

from IPython.display import IFrame
IFrame("./images/4-point-kit-Experiments-manual-2.0.pdf", width=800, height=600)

Calibration¶

1. Plot the temperature [K] vs. resistance [$\Omega$]

2. Give answer here

3. Find the curve equation, $Temp [K] = aR[\Omega]+b$

4. Give answer here

Experiments¶

1. Plot the superconductor resistance (R=V/I) vs. the temperature. Use the thermomete formula you calculated in the previu s experiment.
2. Give answer here
3. Compare the 2-wire data to the 4-wire data. Explain the differences.
4. Give answer here
5. Which measurement is suitable for measuring the critical temperature? Why?
6. Give answer here
7. What is the width (in K) of the transition? Determine the critical temperature.
8. Give answer here

9. What are the Superconductor properties that effect the transition temperature and width?

10. Give answer here