Field-induced partial disorder in a Shastry-Sutherland lattice

Madalynn Marshall; Brianna R. Billingsley; Xiaojian Bai; Qianli Ma; Tai Kong; Huibo Cao

doi:10.1038/s41467-023-39409-1

Field-induced partial disorder in a Shastry-Sutherland lattice

Madalynn Marshall, Brianna R. Billingsley, Xiaojian Bai, Qianli Ma, Tai Kong, Huibo Cao

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

A 2-Q antiferromagnetic order of the ferromagnetic dimers was found below T _N = 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 H _c ~1.7 T, indicating a partial disorder. The H _c varies with temperature and is manifested in the H-T phase diagram constructed by measuring the magnetization in BaNd₂ZnS₅.

Original language	English
Article number	3641
Journal	Nature Communications
Volume	14
Issue number	1
DOIs	https://doi.org/10.1038/s41467-023-39409-1
State	Published - Dec 2023

Funding

The research at Oak Ridge National Laboratory (ORNL) was supported by the U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences, Early Career Research Program Award KC0402020, under Contract DE-AC05-00OR22725. This research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by ORNL. We acknowledge and thank Zachary Morgan for the assistance with the data reduction of the neutron diffraction experiments. We acknowledge and thank Cristian Batista for the helpful discussions. We thank Chenyang Jiang for the assistance with the experimental polarized neutron diffraction.

Funders	Funder number
U.S. Department of Energy
Office of Science
Basic Energy Sciences	DE-AC05-00OR22725, KC0402020
Oak Ridge National Laboratory

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title = "Field-induced partial disorder in a Shastry-Sutherland lattice",

abstract = "A 2-Q antiferromagnetic order of the ferromagnetic dimers was found below T N = 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 N{\'e}el-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 H c ~1.7 T, indicating a partial disorder. The H c varies with temperature and is manifested in the H-T phase diagram constructed by measuring the magnetization in BaNd2ZnS5.",

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AU - Marshall, Madalynn

AU - Billingsley, Brianna R.

AU - Bai, Xiaojian

AU - Ma, Qianli

AU - Kong, Tai

AU - Cao, Huibo

PY - 2023/12

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N2 - A 2-Q antiferromagnetic order of the ferromagnetic dimers was found below T N = 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 H c ~1.7 T, indicating a partial disorder. The H c varies with temperature and is manifested in the H-T phase diagram constructed by measuring the magnetization in BaNd2ZnS5.

AB - A 2-Q antiferromagnetic order of the ferromagnetic dimers was found below T N = 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 H c ~1.7 T, indicating a partial disorder. The H c varies with temperature and is manifested in the H-T phase diagram constructed by measuring the magnetization in BaNd2ZnS5.

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Field-induced partial disorder in a Shastry-Sutherland lattice

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