Abstract
Epitaxial thin films of dysprosium-praseodymium and erbium-praseodymium alloys have been studied using neutron and x-ray diffraction. The magnetic and structural properties have been determined for DyxPr1-x for 1.0 greater than or equal to x greater than or equal to 0.5 and for Er0.5Pr0.5. The crystal structure is hexagonal close-packed (hcp) for 1.0 greater than or equal to x greater than or equal to 0.6 and changes to the Sm type for x similar to 0.5. The hcp samples form basal-plane helices with a transition to ferromagnetism accompanied by a discontinuity in the lattice parameter c. The alloys with the Sm structure form commensurate magnetic structures similar to that of Sm metal with anisotropy dictated by the heavy-rare-earth constituent. The changes in transition temperatures, magnetoelastic effects and modulation wave vector with composition have been studied. The relationships between change in ordering wave vector and magnetization and between transition temperature and the de Gennes factor of the constituents have been established for light-heavy-rare-earth systems.
Original language | English |
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Pages (from-to) | 10175-10189 |
Number of pages | 15 |
Journal | Journal of Physics: Condensed Matter |
Volume | 13 |
Issue number | 45 |
DOIs | |
Publication status | Published - 12 Nov 2001 |
Keywords / Materials (for Non-textual outputs)
- SUPERLATTICES
- TEMPERATURES
- TRANSITION
- FILMS
- DY