Year : 2013, Volume : 38, Issue : 1to4
First page : ( 45) Last page : ( 50)
Print ISSN : 0379-0479. Online ISSN : 2349-2120. Published online : 2013  3.

Automized measurements of RT and I-V at low temperatures and high magnetic fields using LabVIEW

Singh Manju¹, Bhadauria P.P.S.¹, Gupta Anurag¹, Kishan Hari¹

¹National Physical Laboratory (CSiR), Dr K.S. Krishnan Marg, New Delhi, India-110012

Abstract

A fully automized magnetotransport setup is developed for RT and IV characterization of superconducting samples in a temperature range T = 4.2 - 300 K and in magnetic field B = 0 - 7T. A N₂ jacketed He cryostat, 7 Tes/a magnet and variable temperature insert (VTI) are assembled to carry out the measurements. Based on LabViEW and Genera! Purpose interface Bus (GPIB) an exhaustive software comprising of monitoring, control and data acquisition is developed. The software is versatile, for instance, parameters like increasing/decreasing temperature and field, dynamic/PID controlled temperature, pulsed current for IV and statistics of the measured data are user defined. The data is stored in Excel worksheet and displayed online as RT and IV graphs during measurements. The setup and software are tested on a NbN superconducting thin film at low temperatures and high fields.

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Keywords

Magnetotransport Setup, Superconductors, Automation, Control, Data Acquisition.

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