Field-induced partial disorder in a Shastry-Sutherland lattice

Madalynn Marshall, Brianna R. Billingsley, Xiaojian Bai, Qianli Ma, Tai Kong and Huibo Cao ()
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Madalynn Marshall: Oak Ridge National Laboratory
Brianna R. Billingsley: University of Arizona
Xiaojian Bai: Oak Ridge National Laboratory
Qianli Ma: Oak Ridge National Laboratory
Tai Kong: University of Arizona
Huibo Cao: Oak Ridge National Laboratory

Nature Communications, 2023, vol. 14, issue 1, 1-7

Abstract: Abstract A 2-Q antiferromagnetic order of the ferromagnetic dimers was found below TN = 2.9 K in the Shastry-Sutherland lattice BaNd2ZnS5 by single crystal neutron diffraction. The magnetic order can be understood by the orthogonal arrangement of local Ising Nd spins, identified by polarized neutrons. A field was applied along [1 -1 0] to probe the observed metamagnetic transition in the magnetization measurement. The field decouples two magnetic sublattices corresponding to the propagation vectors q1 = (½, ½, 0) and q2 = (−½, ½, 0), respectively. Each sublattice shows a “stripe” order with a Néel-type arrangement in each single layer. The “stripe” order with q1 remains nearly intact up to 6 T, while the other one with q2 is suppressed at a critical field Hc ~1.7 T, indicating a partial disorder. The Hc varies with temperature and is manifested in the H-T phase diagram constructed by measuring the magnetization in BaNd2ZnS5.

Date: 2023
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DOI: 10.1038/s41467-023-39409-1

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