Effect of La impurities on the phase transitions in PrFe4P 12

Takashi Tayama*, Yuta Isobe, Toshiro Sakakibara, Hitoshi Sugawara, Yuji Aoki, Hideyuki Sato

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The effect of La impurities on the low-field (A phase) and high-field (B phase) ordered states in PrFe4P12 has been studied using dc magnetization measurements on a series of Pr1-xLa xFe4P12 (x = 0, 0.01, 0.05, and 0.15). It is found that the long-range A phase order evolves to a short-range one at a very small La concentration between x = 0.01 and 0.05. We also find clear evidence for the existence of ferromagnetism in the sample with x ≥ 0:05. Remarkably, the ferromagnetic ordering temperature TC increases from 1.05 K for x = 0.05 to 1.45 K for x = 0.15, although the Weiss temperature decreases with increasing x. These observations indicate the competition between the A phase and ferromagnetic state, and the role of nesting on the A phase transition is emphasized.

Original languageEnglish
Article number083702
JournalJournal of the Physical Society of Japan
Volume76
Issue number8
DOIs
StatePublished - 2007/08

Keywords

  • Fermi surface nesting
  • Filled skutterudite
  • Impurity effect
  • Magnetization
  • Phase diagram
  • PrFeP

ASJC Scopus subject areas

  • General Physics and Astronomy

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