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Issue 32, 2019
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REZnAl11O19 (RE = Pr, Nd, Sm–Tb): a new family of ideal 2D triangular lattice frustrated magnets

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Abstract

We report the synthesis, structure and magnetic properties of a new family of rare-earth (RE) based magnetoplumbite-type REZnAl11O19 (RE = Pr–Tb) compounds with space-group P63/mmc. The structural analysis reveals that magnetic RE ions form layers of ideal 2D triangular-lattices in the ab-plane well separated by several nonmagnetic polyhedra layers along the c-axis. The magnetic susceptibilities reveal that the compounds display dominant antiferromagnetic (AFM) exchange interactions and there is no magnetic transition down to 2 K. As a representative, PrZnAl11O19 exhibits large magnetic frustration with frustration index f = |θCW/TN| > 23 and absence of magnetic order down to 0.43 K, serving as a promising quantum spin liquid candidate. The magnetizations combined with electron spin resonances indicate the distinct anisotropic magnetic behaviors for compounds with different RE ions. These series of compounds provide a modeling system for exploring the novel magnetic phases of RE ions on ideal 2D triangular lattices.

Graphical abstract: REZnAl11O19 (RE = Pr, Nd, Sm–Tb): a new family of ideal 2D triangular lattice frustrated magnets

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Article information


Submitted
18 May 2019
Accepted
24 Jul 2019
First published
26 Jul 2019

J. Mater. Chem. C, 2019,7, 10073-10081
Article type
Paper

REZnAl11O19 (RE = Pr, Nd, Sm–Tb): a new family of ideal 2D triangular lattice frustrated magnets

M. Ashtar, M. A. Marwat, Y. X. Gao, Z. T. Zhang, L. Pi, S. L. Yuan and Z. M. Tian, J. Mater. Chem. C, 2019, 7, 10073
DOI: 10.1039/C9TC02643F

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