Fantastic n = 4: Ce5Co4+xGe13-ySny of the An+1MnX3n+1 homologous series

Ashley Weiland; Kaya Wei; Gregory T McCandless; Ryan E Baumbach; Julia Y Chan

doi:10.1063/5.0045015

Fantastic n = 4: Ce₅Co_4+xGe_13-ySn_y of the A_n+1M_nX_3n+1 homologous series

J Chem Phys. 2021 Mar 21;154(11):114707. doi: 10.1063/5.0045015.

Authors

Ashley Weiland¹, Kaya Wei², Gregory T McCandless¹, Ryan E Baumbach², Julia Y Chan¹

Affiliations

¹ Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, USA.
² National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.

PMID: 33752369
DOI: 10.1063/5.0045015

Abstract

Ce-based intermetallics are of interest due to the potential to study the interplay of localized magnetic moments and conduction electrons. Our work on Ce-based germanides led to the identification of a new homologous series A_n+1M_nX_3n+1 (A = rare earth, M = transition metal, X = tetrels, and n = 1-6). This work presents the single-crystal growth, structure determination, and anisotropic magnetic properties of the n = 4 member of the Ce_n+1Co_nGe_3n+1 homologous series. Ce₅Co_4+xGe_13-ySn_y consists of three Ce sites, three Co sites, seven Ge sites, and two Sn sites, and the crystal structure is best modeled in the orthorhombic space group Cmmm where a = 4.3031(8) Å, b = 45.608(13) Å, and c = 4.3264(8) Å, which is in close agreement with the previously reported Sn-free analog where a = 4.265(1) Å, b = 45.175(9) Å, and c = 4.293(3) Å. Anisotropic magnetic measurements show Kondo-like behavior and three magnetic transitions at 6, 4.9, and 2.4 K for Ce₅Co_4+xGe_13-ySn_y.