4.6 Article

Ground-state degeneracy and complex magnetism of geometrically frustrated Gd2Ir0.97Si2.97

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PHYSICAL REVIEW B
卷 106, 期 22, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.106.224427

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  1. University Grants Commission (UGC), Govt. of India
  2. SINP, Kolkata
  3. U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering
  4. U.S. Department of Energy by Iowa State University [DE-AC02-07CH11358]

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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 similar to 3 K, which could be correlated with competing antiferromagnetic and ferrimagnetic structures predicted theoretically.
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 similar to 3 K. The complex magnetism in the compound could be correlated with competing antiferromagnetic and ferrimagnetic structures predicted theoretically.

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