Influence of supercooling on the thermally induced first-order magnetic transition in magnetocaloric compound La(Fe0.88Si0.12) 13

Asaya Fujita, S. Fujieda, K. Fukamichi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Supercooling behavior in the thermally induced first-order transition from the paramagnetic (P) to ferromagnetic (F) phase is clarified for La(Fe 0.88Si0.12)13. The degree of supercooling is about 0.17 K at a cooling rate of -3.0 mK/s and exhibits a slight increase against the cooling rate, indicating the heterogeneous nucleation. On the other hand, the retaining time for the plateau-like behavior of the sample temperature after supercooling strongly depends on the cooling rate in inverse proportion. From these differences, the driving mechanism of the nucleation and growth of the F phase in the P matrix is elucidated. The influence of supercooling on the transition progress is also evaluated from the viewpoint of practical operation of a magnetic refrigerator.

Original languageEnglish
Article number6027628
Pages (from-to)3387-3390
Number of pages4
JournalIEEE Transactions on Magnetics
Volume47
Issue number10
DOIs
Publication statusPublished - 2011 Oct

Keywords

  • Itinerant electron metamagnetic transition
  • latent heat
  • magnetocaloric effect
  • nucleation rate
  • supercooling

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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