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arXiv · 2208.02795

Field-Induced Partial Disorder in a Shastry-Sutherland Lattice

Madalynn Marshall·Brianna R. Billingsley·Xiaojian Bai·Qianli Ma·Tai Kong·Huibo Cao
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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= (0.5, 0.5, 0) and q2= (-0.5, 0.5, 0), respectively. Each sublattice shows a stripe order with a Neel-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.

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Madalynn Marshall, Brianna R. Billingsley, Xiaojian Bai, Qianli Ma, Tai Kong, Huibo Cao. 2022-08-04. Field-Induced Partial Disorder in a Shastry-Sutherland Lattice. https://doi.org/10.1038/s41467-023-39409-1

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