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Structure and magnetism in DyxPr1-x and ErxPr1-x alloys: II. Double-hexagonal close-packed structure

Research output: Contribution to journalArticle

  • Paul Clegg
  • R A Cowley
  • J P Goff
  • D F McMorrow
  • M Sawicki
  • R C C Ward
  • M R Wells

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Original languageEnglish
Pages (from-to)10191-10206
Number of pages16
JournalJournal of Physics: Condensed Matter
Volume13
Issue number45
DOIs
Publication statusPublished - 12 Nov 2001

Abstract

The structure and magnetism of epitaxial thin-film dysprosium-praseodymium and erbium-praseodymium alloys with the double-hexagonal close-packed (dhcp) crystal structure have been investigated. Short-range atomic and magnetic order have been found for DyxPr1-x with 0.4 greater than or equal to x greater than or equal to 0.05 and ErxPr1-x with 0.2 greater than or equal to x greater than or equal to 0.05. The distribution of the two species within the alloys was established with x-ray and neutron diffraction techniques. The atomic order is complex; the four planes of the unit cell have differing concentrations of constituents. In addition there are occasional clusters within the close-packed planes. The magnetic behaviour was investigated using neutron diffraction. Surprisingly, only short-range order is observed in the dhcp-structure alloys. Magnetization measurements suggest that Dy0.13Pr0.87 exhibits spin-glass behaviour. The roles of the indirect exchange interaction, the dipole-dipole interaction and the crystal field are considered in detail.

    Research areas

  • PRASEODYMIUM, TEMPERATURES, SYSTEMS

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