Chemical Pressure Tuning Magnetism from Pyrochlore to Triangular Lattices

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

doi:10.1021/acs.inorgchem.2c02232

Chemical Pressure Tuning Magnetism from Pyrochlore to Triangular Lattices

Abstract

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 LiYbSe2 into a triangular lattice by doping Ga or In. Li3−xGaxYb3Se6 and Li3−xInxYb3−yInySe6/Li3−xInxYb3−y□ySe6 crystallize in a trigonal α-NaFeO2 structure-type (space group R3̅m) 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−yInySe6 depending on the reaction conditions. Dominant antiferromagnetic interactions are revealed by magnetic measurements in both Li3−xGaxYb3Se6 and Li3−xInxYb3−yInySe6/ Li3−xInxYb3−y□ySe6. 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−y□ySe6, and the LiYbSe2 previously discovered by our group provide an ideal platform to understand the complex structure−magnetism correlations from 3D to 2D frustrated lattices.

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Keywords

SYNTHESIS, CHEMICAL PRESSURE

Details

Category:

Articles

Type:

artykuły w czasopismach

Published in:

INORGANIC CHEMISTRY no. 61, pages 18010 - 18018,
ISSN: 0020-1669

Language:

English

Publication year:

2022

Bibliographic description:

Dissanayaka Mudiyanselage R. S., Klimczuk T., Ni D., Cava R. J., Xie W.: Chemical Pressure Tuning Magnetism from Pyrochlore to Triangular Lattices// INORGANIC CHEMISTRY -Vol. 61,iss. 45 (2022), s.18010-18018

DOI: