A.c. magnetic measurements on superconductors using two-channel dynamic analyser

✍ Scribed by P. Fabbricatore; S. Farinon; G. Gemme; R. Musenich; R. Parodi; B. Zhang

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 327 KB
• Volume: 33
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(93)90013-e

✦ Synopsis

A.c. magnetic measurements are powerful tools for characterizing superconducting materials. The a.c. susceptibility is the most used measurement and is commonly performed using a two-phase lock-in amplifier. This article describes a different method to carry out this measurement, employing a two-channel dynamic analyser. This instrument also allows us to measure further quantities, such as higher harmonics of the a.c. susceptibility, the so-called wide-band susceptibility and the magnetization loops. A remarkable feature of the dynamic analyser is its wide frequency range, from 244/~Hz to 1 02 kHz, allowing simple, comprehensive and reliable characterization of superconductors.