Magnetic structures and crystal field in the heavy electron materials YbAgGe and YbPtIn

TitleMagnetic structures and crystal field in the heavy electron materials YbAgGe and YbPtIn
Publication TypeJournal Article
Year of Publication2007
AuthorsBonville P, Rams M, Krolas K, Sanchez JP, Canfield PC, Trovarelli O, Geibel C
Journal TitleEuropean Physical Journal B
Volume55
Pages77-84
Date PublishedJan
Type of ArticleArticle
ISBN Number1434-6028
Accession NumberISI:000244306000011
KeywordsCOMPOUND YBAGGE, FERMION YBAGGE, INELASTIC NEUTRON-SCATTERING, model, spin, temperature
Abstract

We have examined the magnetic properties of the heavy electron compounds YbAgGe and YbPtIn by Yb-170 Mossbauer spectroscopy down to 0.1 K, and the crystal field properties of YbAgGe by Perturbed Angular Correlations (PAC) measurements up to 900 K. In YbAgGe, we show that each of the two magnetically ordered phases below 0.8 K involves a specific incommensurate modulation of the Yb moment. An analysis of existing low temperature specific heat data suggests the persistence of fluctuations of the correlated Yb spins down to 0.1 K. The PAC data allow to discriminate among proposed Yb3+ crystal field level schemes. In YbPtIn, we show that the low temperature magnetic order phase has an antiferro-para structure, where zero moment Yb ions coexist with large moment ones, and that a 90 degrees moment reorientation occurs at 1.4 K.

DOI10.1140/epjb/e2007-00042-6
Alternate JournalEur. Phys. J. B