Chemical Pressure Tuning Magnetism from Pyrochlore to Triangular Lattices

Ranuri S. Dissanayaka Mudiyanselage, Tomasz Klimczuk, Danrui Ni, Robert J. Cava, Weiwei Xie

Research output: Contribution to journalArticlepeer-review


Geometrically frustrated lattices combined with magnetism usually host quantum fluctuations that suppress magnetic orders and generate highly entangled ground states. Three-dimensionally (3D) frustrated magnets generally exist in the diamond and pyrochlore lattices, while two-dimensionally (2D) frustrated geometries contain Kagomé, triangular, and honeycomb lattices. In this work, we reported using chemical pressure to tune the magnetism of the pyrochlore lattice in LiYbSe2into a triangular lattice by doping Ga or In. Li3-xGaxYb3Se6and Li3-xInxYb3-yInySe6/Li3-xInxYb3-yySe6crystallize in a trigonal α-NaFeO2structure-type (space group R3¯ m) and can be synthesized using either LiCl or Se flux. In Li3-xGaxYb3Se6, Ga3+and Li+are mixed, leaving Yb3+on the triangular plane. Instead of just Li+being replaced in Li3-xGaxYb3Se6, In3+was observed in both the Li+and Yb3+layers in Li3-xInxYb3-yInySe6depending on the reaction conditions. Dominant antiferromagnetic interactions are revealed by magnetic measurements in both Li3-xGaxYb3Se6and Li3-xInxYb3-yInySe6/Li3-xInxYb3-yySe6. However, no long-range magnetic order is detected in thermomagnetic measurements above 1.8 K due to geometrical frustration. Thus, Li3-xGaxYb3Se6, Li3-xInxYb3-yInySe6/Li3-xInxYb3-yySe6, and the LiYbSe2previously discovered by our group provide an ideal platform to understand the complex structure-magnetism correlations from 3D to 2D frustrated lattices.

Original languageEnglish (US)
Pages (from-to)18010-18018
Number of pages9
JournalInorganic Chemistry
Issue number45
StatePublished - Nov 14 2022

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry


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