Pressure tuning of competing magnetic interactions in intermetallic CeFe2

Jiyang Wang, Yejun Feng, R. Jaramillo, Jasper van Wezel, PC Canfield, TF Rosenbaum

Research output: Contribution to journalArticle (Academic Journal)peer-review

19 Citations (Scopus)

Abstract

We use high-pressure magnetic x-ray diffraction and numerical simulation to determine the low-temperature magnetic phase diagram of stoichiometric CeFe2. Near 1.5 GPa we find a transition from ferromagnetism to antiferromagnetism, accompanied by a rhombohedral distortion of the cubic Laves crystal lattice. By comparing pressure and chemical substitution we find that the phase transition is controlled by a shift of magnetic frustration from the Ce-Ce to the Fe-Fe sublattice. Notably the dominant Ce-Fe magnetic interaction, which sets the temperature scale for the onset of long-range order, remains satisfied throughout the phase diagram but does not determine the magnetic ground state. Our results illustrate the complexity of a system with multiple competing magnetic energy scales and lead to a general model for magnetism in cubic Laves phase intermetallic compounds.
Original languageEnglish
Article number014422
Number of pages7
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume86
DOIs
Publication statusPublished - 20 Jul 2012

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