Abstract:
The aim of the experiments is to measure the resistance of commonly used materials like
aluminium, copper, and nichrome at both room temperature and cryogenic temperature (77K).
To achieve this, an experimental setup will be developed using instruments such as the kelvin
double bridge and LCR meter. Another setup will be created to measure the resistance of the
materials as they are cooled from room temperature to 77K, and the measurements will be
continued as the materials are gradually warmed back up. By analyzing these measurements, we
can determine how the resistance of the materials changes at different temperatures. These
experimental setups will provide valuable information on the resistance characteristics of
materials at different temperatures, potentially leading to new applications in cryogenic cooling
technology for medical and diagnostic purposes. The experiment conducted with BSCCO 2223
(HTS) using different constant currents (100mA, 200mA, 500mA, and 1000mA) demonstrated
an average transition temperature of 104K, which falls within the reported range of BSCCO
2223's Tc in various literature, validating the reliability of the proposed experimental setup.
Furthermore, aluminium and copper show a significant decrease in resistance at cryogenic
temperatures, while nichrome's resistance remains relatively stable at 77K. This suggests that, in
general, resistance materials experience minimal changes in resistance when exposed to
cryogenic temperatures. Although there is a slight variation in resistivity compared to literature
values for all three tested materials, the experimental values still follow a consistent trend in
resistance with temperature, as described in the literature.
