Nearly ferromagnetic Fermi-liquid behaviour in YFe2Zn20 and high-temperature ferromagnetismof GdFe2Zn20

TitleNearly ferromagnetic Fermi-liquid behaviour in YFe2Zn20 and high-temperature ferromagnetismof GdFe2Zn20
Publication TypeJournal Article
Year of Publication2007
AuthorsJia S, Bud'ko SL, Samolyuk GD, Canfield PC
Journal TitleNature Physics
Volume3
Pages334-338
Date PublishedMay
Type of ArticleArticle
ISBN Number1745-2473
Accession NumberISI:000246738300018
Keywordsni, PD, susceptibility
Abstract

One of the historic goals of alchemy was to turn base elements into precious ones. Although the practice of alchemy has been superseded by chemistry and solid-state physics, the desire to dramatically change or tune the properties of a compound, preferably through small changes in stoichiometry or composition, remains. This desire becomes even more compelling for compounds that can be tuned to extremes in behaviour. Here, we report that the RT2Zn20 (R = rare earth and T = transition metal) family of compounds manifests exactly this type of versatility, even though they are more than 85% Zn. By tuning T, we find that YFe2Zn20 is closer to ferromagnetism than elemental Pd, the classic example of a nearly ferromagnetic Fermi liquid. By submerging Gd in this highly polarizable Fermi liquid, we tune the system to a remarkably high-temperature ferromagnetic (T-C = 86 K) state for a compound with less than 5% Gd. Although this is not quite turning lead into gold, it is essentially tuning Zn to become a variety of model compounds.

DOI10.1038/nphys568
Alternate JournalNat. Phys.