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

Xing, Jie; Sanjeewa, Liurukara D.; Kim, Jungsoo; Meier, William R.; May, Andrew F.; Zheng, Qiang; Custelcean, Radu; Stewart, G. R.; Sefat, Athena Safa

doi:10.1103/physrevmaterials.3.114413

Title: Synthesis, magnetization, and heat capacity of triangular lattice materials ${NaErSe}_{2}$ and ${KErSe}_{2}$

Journal Article · 25 November 2019 · Physical Review Materials

DOI: https://doi.org/10.1103/physrevmaterials.3.114413 · OSTI ID:1761718

^[1];

^[1]; Kim, Jungsoo ^[2];

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^[1]; Zheng, Qiang ^[3];

^[4]; Stewart, G. R. ^[2];

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Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
Univ. of Florida, Gainesville, FL (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. of Tennessee, Knoxville, TN (United States)
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 $A {ErSe}_{2}$ ( $A = Na, K$ ) which contain perfect triangular lattices of ${Er}^{3 +}$ . The magnetization data suggests no long-range magnetic order exists in $A {ErSe}_{2}$ ( $A = Na, K$ ), which is consistent with the heat capacity measurements. Large anisotropy is observed between the magnetization within the $a b$ plane and along the $c$ axis of both compounds. When the magnetic field is applied along the $a b$ plane, anomalies are observed at 1.8 $μ_{B}$ in ${NaErSe}_{2}$ at 0.2 T and 2.1 $μ_{B}$ in ${KErSe}_{2}$ at 0.18 T. Unlike ${NaErSe}_{2}$ , a plateaulike field-induced metamagnetic transition is observed for $H ∥ c$ below 1 K in ${KErSe}_{2}$ . 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 $A {ErSe}_{2}$ 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.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences 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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Field-induced magnetic transition and spin fluctuations in the quantum spin-liquid candidate CsYbSe 2 Xing, Jie; Sanjeewa, Liurukara D.; Kim, Jungsoo Physical Review B, Vol. 100, Issue 22 https://doi.org/10.1103/physrevb.100.220407	journal	December 2019
Frustrated Magnetism in Triangular Lattice TlYbS2 Crystals Grown via Molten Flux Ferreira, Timothy; Xing, Jie; Sanjeewa, Liurukara D. Frontiers in Chemistry, Vol. 8 https://doi.org/10.3389/fchem.2020.00127	journal	February 2020
Frustrated Magnetism in Triangular Lattice TlYbS$_2$ Crystals Grown via Molten Flux Ferreira, Timothy; Xing, Jie; Sanjeewa, Liurukara D. arXiv https://doi.org/10.48550/arxiv.2003.03321	text	January 2020

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CSD 1971688: Experimental Crystal Structure Determination Jie, Xing,; D., Sanjeewa, Liurukara; Jungsoo, Kim, https://doi.org/10.25505/fiz.icsd.cc245pvw The current record is supplemented by this dataset	dataset	January 2019
CSD 1971689: Experimental Crystal Structure Determination Jie, Xing,; D., Sanjeewa, Liurukara; Jungsoo, Kim, https://doi.org/10.25505/fiz.icsd.cc245pwx The current record is supplemented by this dataset	dataset	January 2019

Title: Synthesis, magnetization, and heat capacity of triangular lattice materials NaErSe 2 and KErSe 2

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