Understanding the extraordinary magnetoelastic behavior in GdNi

TitleUnderstanding the extraordinary magnetoelastic behavior in GdNi
Publication TypeJournal Article
Year of Publication2008
AuthorsPaudyal D, Mudryk Y, Lee YB, Pecharsky VK, Gschneidner KAJ, Harmon BN
Journal TitlePhysical Review B
Date Published11/01
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberISI:000261214800082
Keywordscrystal-structure, electronic-structure, GDNI1-XCUX COMPOUNDS, NI INTERMETALLIC COMPOUNDS, RARE, SINGLE-CRYSTAL, temperature, THERMAL-EXPANSION, thermodynamics, transition

Measurements as a function of both magnetic field and temperature along with first principles spin polarized calculations explain the remarkable magnetoelastic properties exhibited by GdNi below its Curie temperature. The lattice constants a and b elongate continuously by 0.35% and 0.49%, respectively, while the c axis contracts by 0.78%, all without phase volume change. Calculations and experiment confirm a relatively shallow magnetization-dependent energy landscape modified by the increased spin splitting of the conduction band as the 4f moments order.

Alternate JournalPhys. Rev. B