Onset of ferromagnetism in the 5f-band metamagnet UCoAl upon partial dilution of the U sublattice

A. V. Andreev, V. Sechovský, D. Rafaja, L. Dobiášová, Y. Homma, Y. Shiokawa

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

UCoAl is a 5f-band metamagnet. The U1-xRxCoAl solid solutions with R=Lu and Y exhibit ferromagnetism for low R content. The spontaneous magnetic moment reaches a maximum value of 0.09 μB and 0.21 μB at x=0.06 for R=Lu and Y, respectively, and vanishes at x≥0.15. The evolution of crystal structure parameters together with magnetism are compared for U1-xLuxCoAl, U1-xYxCoAl and also for UCoAl1-xXx (X=Ga, In, Sn). It is concluded that the linear changes of lattice dimensions rather that the unit cell volume play a principal role in determining the ground state properties of UCoAl related compounds. The decrease of the c/a ratio in these materials correlates with the transformation from the metamagnetic to a ferromagnetic state.

Original languageEnglish
Pages (from-to)77-81
Number of pages5
JournalJournal of Alloys and Compounds
Volume307
Issue number1-2
DOIs
Publication statusPublished - 2000 Jul 14

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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