Ground-state degeneracy and complex magnetism of geometrically frustrated Gd 2 Ir 0.97 Si 2.97

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2022-12-01
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Chakraborty, Sudip
Gupta, Shuvankar
Pakhira, Santanu
Choudhary, Renu
Biswas, Anis
Mudryk, Yaroslav
Pecharsky, Vitalij K.
Mazumdar, Chandan
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Iowa State University Digital Repository, Ames IA (United States)
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Materials Science and EngineeringAmes National Laboratory
Abstract
A new triangular-lattice intermetallic compound Gd2Ir0.97Si2.97 was successfully synthesized as single phase by deliberately introducing vacancies. Theoretical analysis suggests that the ground state is competing with several low-energy spin configurations due to magnetic frustration on a nearly ideal triangular lattice. Despite a number of competing magnetic states, the compound exhibits long-range antiferromagnetic order at 16 K, a long-range ferrimagnetic transition at 6.5 K, and a reentrant cluster-glass transition below Tf ∼ 3 K. The complex magnetism in the compound could be correlated with competing antiferromagnetic and ferrimagnetic structures predicted theoretically.
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This article is published as Chakraborty, Sudip, Shuvankar Gupta, Santanu Pakhira, Renu Choudhary, Anis Biswas, Yaroslav Mudryk, Vitalij K. Pecharsky, Duane D. Johnson, and Chandan Mazumdar. "Ground-state degeneracy and complex magnetism of geometrically frustrated Gd 2 Ir 0.97 Si 2.97." Physical Review B 106, no. 22 (2022): 224427. DOI: 10.1103/PhysRevB.106.224427. Copyright 2022 American Physical Society. Posted with permission. DOE Contract Number(s): AC02-07CH11358
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