Strong pressure effect on the Curie temperature of itinerant-electron metamagnetic La(Fe0.88Si0.12)13Hy and La0.7Ce0.3(Fe0.88Si0.12) 13Hy

Shun Fujieda, Asaya Fujita, Kazuaki Fukamichi

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The initial pressure shift of the Curie temperature Tc for the first-order transition, dTc/dP, for La(Fe0.88Si 0.12)13 becomes small after hydrogen absorption. In addition, the hydrogen absorption reduces the ratio of the volume change at Tc to the magnetization squared at Tc, Δω(Tc)/M(Tc)F2, suggesting the decrease of the magnetoelastic coupling constant κC mv. On the other hand, dTc/dP is enhanced by the partial substitution of Ce for La in connection with the change of the band structure. Consequently, dTc/dP of La0.7Ce0.3(Fe 0.88Si0.12)13Hy is larger than that ot La(Fe0.88Si0.12)13Hy in a wide change or Tc.

Original languageEnglish
Pages (from-to)483-486
Number of pages4
JournalMaterials Transactions
Volume50
Issue number3
DOIs
Publication statusPublished - 2009 Mar

Keywords

  • Hydrogen absorption
  • Magnetovolume effect
  • Metamagnetic transition
  • Pressure effect
  • Spin fluctuation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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