Electronic and magnetic properties of layered LnFePO (Ln = la and Ce)

Yoichi Kamihara, Hidenori Hiramatsu, Masahiro Hirano, Hiroshi Yanagi, Toshio Kamiya, Hideo Hosono

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Effects of the replacement of La with Ce on the electronic and magnetic properties of a layered superconductor LaFePO (Tc = ∼5 K) were studied. Polycrystalline samples of CeFePO, prepared by a solid-state reaction, showed metallic conduction down to 2 K without exhibiting superconducting transition, although the resistivity decreased largely at temperatures below 30 K. Further, they showed an apparent positive magnetoresistance (MR) below ∼2 K, superposed on a negative MR. Temperature dependence of magnetic susceptibility is decomposed to a temperature-sensitive Curie-Weiss component presumably due to the Ce3+ ions with a magnetic moment of 1.98μB and a less temperature-sensitive component attributable to itinerant electrons. The magnetic interaction between Ce3+ ions and itinerant electrons in CeFePO likely suppresses the superconducting transition observed in LaFePO.

Original languageEnglish
Pages (from-to)2916-2918
Number of pages3
JournalJournal of Physics and Chemistry of Solids
Volume69
Issue number11
DOIs
Publication statusPublished - 2008 Nov
Externally publishedYes

Keywords

  • Electrical conductivity
  • Inorganic compounds
  • Magnetic materials
  • Magnetic properties
  • Superconductors

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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