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Synthesis, magnetization, and heat capacity of triangular lattice materials NaErSe2 and KErSe2

Journal Article · · Physical Review Materials
 [1];  [1];  [2];  [1];  [1];  [3];  [4];  [2];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  2. Univ. of Florida, Gainesville, FL (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. of Tennessee, Knoxville, TN (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
In this paper we report the synthesis, magnetization, and heat capacity of the frustrated magnets AErSe2 ( A=Na,K ) which contain perfect triangular lattices of Er3+ . The magnetization data suggests no long-range magnetic order exists in AErSe2 ( A=Na,K ), which is consistent with the heat capacity measurements. Large anisotropy is observed between the magnetization within the ab plane and along the c axis of both compounds. When the magnetic field is applied along the ab plane, anomalies are observed at 1.8 μB in NaErSe2 at 0.2 T and 2.1 μB in KErSe2 at 0.18 T. Unlike NaErSe2 , a plateaulike field-induced metamagnetic transition is observed for Hc below 1 K in KErSe2 . Two broad peaks are observed in the heat capacity below 10 K indicating possible crystal electric field (CEF) effects and magnetic entropy released under different magnetic fields. All results indicate that AErSe2 are strongly anisotropic, frustrated magnets with field-induced transition at low temperature. The lack of signatures for long-range magnetic order implies that these materials are candidates for hosting a quantum spin liquid ground state.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC05-00OR22725; FG02-86ER45268
OSTI ID:
1761718
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 11 Vol. 3; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Field-induced magnetic transition and spin fluctuations in the quantum spin-liquid candidate CsYbSe 2 journal December 2019
Frustrated Magnetism in Triangular Lattice TlYbS2 Crystals Grown via Molten Flux journal February 2020
Frustrated Magnetism in Triangular Lattice TlYbS$_2$ Crystals Grown via Molten Flux text January 2020


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