#TITLE_ALTERNATIVE#

• Main Author: KISTILENSA (NIM : 10210072), AMANDA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/25444
• Institution: Institut Teknologi Bandung

A temperature-dependent electrical resistivity measurement system based on voltage-to-current (I-V) curve of a material has been created using a LabVIEW interface. It has been designed to facilitate and accelerate processes for temperature control and voltage and current data acquisition using a semi-automatic system which utilizes the state machine programming architecture and running <br /> <br /> average algorithm. Resistance of a material is acquired through its I-V curve using Ohm's Law, which formulates resistance as the gradient of a line obtained from a linear regression on I-V data points within the ohmic conduction region of the studied material. This measurement system can be more accurate than conventional measurement from a singular I-V measurement because resistance is acquired through several data measurements in the ohmic region. In this project, resistivity measurement using the I-V curve is performed with a variation in temperature within the range of 290 K to 50 K for several types of materials, <br /> <br /> namely semiconductor sample Bi1,5Pb0,5Ca2Co2O8 and superconductor sample Bi2Sr2CaCu2O8+x. Experiment results for Bi1,5Pb0,5Ca2Co2O8 produced a linear I-V curve, showing that measurement has been performed in the ohmic region and producing an appropriate R-T curve. Bi-2212 results showcased a decrease in resistivity towards temperature but critical temperature at 90 K was not observed, leading to the conclusion that the Bi-2212 sample is no longer superconducting, confirmed through a SEM-EDS analysis and <br /> <br /> measurement of magnetization towards temperature. Nevertheless, results align with conventional measurement and consistency from various modes of measurement demonstrate that the interface serves its function within the temeprature-dependent resistivity measurement system.