Design and implementation of a low temperature, inductance based high frequency alternating current susceptometer

E Riordan; J Blomgren; C Jonasson; F Ahrentorp; C Johansson; D Margineda; A Elfassi; S Michel; F Dell'ova; G M Klemencic; S R Giblin

doi:10.1063/1.5074154

Design and implementation of a low temperature, inductance based high frequency alternating current susceptometer

Rev Sci Instrum. 2019 Jul;90(7):073908. doi: 10.1063/1.5074154.

Authors

E Riordan¹, J Blomgren², C Jonasson², F Ahrentorp², C Johansson², D Margineda¹, A Elfassi³, S Michel³, F Dell'ova³, G M Klemencic¹, S R Giblin¹

Affiliations

¹ Department of Physics & Astronomy, Cardiff University, Cardiff CF24 3AA, United Kingdom.
² RISE Acreo, Arvid Hedvalls Backe 4, Box 53071, SE-400 14 Göteborg, Sweden.
³ INSA, Institut National des Sciences Appliques, Toulouse, 135 Avenue de Rangueil, 31077 Toulouse Cedex 4, France.

PMID: 31370440
DOI: 10.1063/1.5074154

Abstract

We report on the implementation of an induction based, low temperature, high frequency ac susceptometer capable of measuring at frequencies up to 3.5 MHz and at temperatures between 2 K and 300 K. Careful balancing of the detection coils and calibration allow a sample magnetic moment resolution of 5 × 10^-10 Am² at 1 MHz. We discuss the design and characterization of the susceptometer and explain the calibration process. We also include some example measurements on the spin ice material CdEr₂S₄ and iron oxide based nanoparticles to illustrate functionality.