Magnetic order in CeI2 View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2002-12

AUTHORS

K.W. Krämer, H.U. Güdel, P. Fischer, L. Keller

ABSTRACT

. CeI2 is a halide with metallic conductivity according to the formula (Ce3+)(I-)2(e-). Magnetic interactions are mediated by the conduction electrons and are significantly stronger than for insulating rare-earth halides. CeI2 crystallizes in the MoSi2 layer-type structure with space group I4/mmm and lattice parameters a=3.87212(5) Å and c=13.8646(2) Å at 15 K. At TN=10.0(2) K, a phase transition to a 3D antiferromagnetically ordered state occurs with an incommensurate k vector of (0, 0.2761(1), 1) at 1.5 K. The k vector is temperature-dependent and, as the sublattice magnetization, reaches saturation below 4 K. CeI2 has one magnetic sublattice with moments parallel to the a axis. The amplitude is sine-modulated along the b axis and amounts to 1.87(1) μB per Ce3+ ion. The crystal-field splitting reduces the ordered moment slightly below the 2F5/2 free-ion value of g·J=15/7 for Ce3+. More... »

PAGES

s595-s597

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s003390101124

DOI

http://dx.doi.org/10.1007/s003390101124

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1013501125


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