Triangular Rare-Earth Lattice Materials RbBa R(BO 3 ) 2 (R = Y, Gd-Yb) and Comparison to the KBa R(BO 3 ) 2 Analogs

Shu Guo, Tai Kong, Weiwei Xie, Loi Nguyen, Karoline Stolze, F. Alex Cevallos, Robert Joseph Cava

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8 Scopus citations

Abstract

A previously unreported family of electrically insulating rare-earth borates, RbBaR(BO 3 ) 2 (R = Y, Gd-Yb), was designed and then successfully obtained by traditional solid-state reaction. They crystallize in a monoclinic crystal system space group P2 1 /m (No. 11). They feature triangular planar rare-earth (R) lattices, which are part of, for example, [Yb(BO 3 ) 2 ] 3- infinite 2D layers. These R-based triangular lattices are stacked with layers of crystallographically ordered Rb and Ba atoms to build the 3D structures. Polycrystalline samples of RbBaR(BO 3 ) 2 were used to study the elementary magnetic properties, and millimeter-size RbBaYb(BO 3 ) 2 single crystals were grown by spontaneous nucleation for further anisotropic magnetic characterization. Antiferromagnetic spin interactions are observed for all magnetic compounds, and no long-range magnetic ordering is found down to 1.8 K. Our results suggest that this RbBaR(BO 3 ) 2 (R = Gd-Yb) family may be of further interest both experimentally and theoretically as highly geometrically frustrated magnets.

Original languageEnglish (US)
Pages (from-to)3308-3315
Number of pages8
JournalInorganic Chemistry
Volume58
Issue number5
DOIs
StatePublished - Mar 4 2019

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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