TY - JOUR
T1 - Chemical Pressure Tuning Magnetism from Pyrochlore to Triangular Lattices
AU - Dissanayaka Mudiyanselage, Ranuri S.
AU - Klimczuk, Tomasz
AU - Ni, Danrui
AU - Cava, Robert J.
AU - Xie, Weiwei
N1 - Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/11/14
Y1 - 2022/11/14
N2 - 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-y□ySe6crystallize 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-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 LiYbSe2previously discovered by our group provide an ideal platform to understand the complex structure-magnetism correlations from 3D to 2D frustrated lattices.
AB - 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-y□ySe6crystallize 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-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 LiYbSe2previously 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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U2 - 10.1021/acs.inorgchem.2c02232
DO - 10.1021/acs.inorgchem.2c02232
M3 - Article
C2 - 36322111
AN - SCOPUS:85141736521
SN - 0020-1669
VL - 61
SP - 18010
EP - 18018
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 45
ER -