High-throughput direct measurement of magnetocaloric effect based on lock-in thermography technique

Yusuke Hirayama, Ryo Iguchi, Xue Fei Miao, Kazuhiro Hono, Ken Ichi Uchida

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We demonstrate a high-throughput direct measurement method for the magnetocaloric effect (MCE) by means of a lock-in thermography (LIT) technique. This method enables systematic measurements of the magnetic-field and operation-frequency dependences of the temperature change induced by the MCE. This is accomplished in a shorter time compared to conventional adiabatic temperature measurement methods. The direct measurement based on LIT is free from any possible miscalculations and errors arising from indirect measurements using thermodynamic relations. Importantly, the LIT technique makes simultaneous MCE measurements of multiple materials possible without increasing the measurement time, realizing high-throughput investigations of the MCE. By applying this method to Gd, we obtain the MCE-induced temperature change of 1.84 ± 0.11 K under a modulation field of 1.0 T and modulation frequency of 0.5 Hz at a temperature of 300.5 ± 0.5 K, offering evidence that the LIT method gives quantitative results.

Original languageEnglish
Article number163901
JournalApplied Physics Letters
Volume111
Issue number16
DOIs
Publication statusPublished - 2017 Oct 16
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'High-throughput direct measurement of magnetocaloric effect based on lock-in thermography technique'. Together they form a unique fingerprint.

  • Cite this