Incommensurate magnetism in ${\mathrm{K}}_{2}{\mathrm{MnS}}_{2\u2013x}{\mathrm{Se}}_{x}$ and prospects for tunable frustration in a triangular lattice of pseudo1D spin chains
Abstract
We report a detailed investigation of K_{2}MnS_{2} and K_{2}MnSe_{2} from the K_{2}MnS_{2} structure type and their magnetic solid solution K_{2}MnS_{2–x}Se_{x} and find that compounds of this structure type consist of strongly coupled pseudoonedimensional antiferromagnetic chains that collectively represent a frustrated twodimensional triangular antiferromagnet. Bulk samples of K_{2}MnS_{2–x}Se_{x} with 0 ≤ x ≤ 2 are characterized using xray diffraction, neutron diffraction, magnetization, and heatcapacity measurements. An incommensurate cycloid magnetic structure with a magnetic propagation vector k = [0.5801] is observed for all samples in K_{2}MnS_{2–x}Se_{x}, and the ordering is robust despite a 12% increase in cell volume. Geometric frustration of chains results in incommensurability along a and a twostep magnetic transition. Here, the varying geometries accessible in compounds of this structure type are presented as promising avenues to tune frustration.
 Authors:

 Univ. of Illinois at UrbanaChampaign, Urbana, IL (United States)
 Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
 Publication Date:
 Research Org.:
 Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), Basic Energy Sciences (BES)
 OSTI Identifier:
 1559626
 Alternate Identifier(s):
 OSTI ID: 1546396
 Grant/Contract Number:
 AC0500OR22725; AC0298CH1088
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Physical Review Materials
 Additional Journal Information:
 Journal Volume: 3; Journal Issue: 6; Journal ID: ISSN 24759953
 Publisher:
 American Physical Society (APS)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 36 MATERIALS SCIENCE
Citation Formats
Bhutani, Ankita, Behera, Piush, McAuliffe, Rebecca D., Cao, Huibo, Huq, Ashfia, Kirkham, Melanie J., dela Cruz, Clarina R., Woods, Toby, and Shoemaker, Daniel P. Incommensurate magnetism in K2MnS2–xSex and prospects for tunable frustration in a triangular lattice of pseudo1D spin chains. United States: N. p., 2019.
Web. doi:10.1103/PhysRevMaterials.3.064404.
Bhutani, Ankita, Behera, Piush, McAuliffe, Rebecca D., Cao, Huibo, Huq, Ashfia, Kirkham, Melanie J., dela Cruz, Clarina R., Woods, Toby, & Shoemaker, Daniel P. Incommensurate magnetism in K2MnS2–xSex and prospects for tunable frustration in a triangular lattice of pseudo1D spin chains. United States. doi:https://doi.org/10.1103/PhysRevMaterials.3.064404
Bhutani, Ankita, Behera, Piush, McAuliffe, Rebecca D., Cao, Huibo, Huq, Ashfia, Kirkham, Melanie J., dela Cruz, Clarina R., Woods, Toby, and Shoemaker, Daniel P. Wed .
"Incommensurate magnetism in K2MnS2–xSex and prospects for tunable frustration in a triangular lattice of pseudo1D spin chains". United States. doi:https://doi.org/10.1103/PhysRevMaterials.3.064404. https://www.osti.gov/servlets/purl/1559626.
@article{osti_1559626,
title = {Incommensurate magnetism in K2MnS2–xSex and prospects for tunable frustration in a triangular lattice of pseudo1D spin chains},
author = {Bhutani, Ankita and Behera, Piush and McAuliffe, Rebecca D. and Cao, Huibo and Huq, Ashfia and Kirkham, Melanie J. and dela Cruz, Clarina R. and Woods, Toby and Shoemaker, Daniel P.},
abstractNote = {We report a detailed investigation of K2MnS2 and K2MnSe2 from the K2MnS2 structure type and their magnetic solid solution K2MnS2–xSex and find that compounds of this structure type consist of strongly coupled pseudoonedimensional antiferromagnetic chains that collectively represent a frustrated twodimensional triangular antiferromagnet. Bulk samples of K2MnS2–xSex with 0 ≤ x ≤ 2 are characterized using xray diffraction, neutron diffraction, magnetization, and heatcapacity measurements. An incommensurate cycloid magnetic structure with a magnetic propagation vector k = [0.5801] is observed for all samples in K2MnS2–xSex, and the ordering is robust despite a 12% increase in cell volume. Geometric frustration of chains results in incommensurability along a and a twostep magnetic transition. Here, the varying geometries accessible in compounds of this structure type are presented as promising avenues to tune frustration.},
doi = {10.1103/PhysRevMaterials.3.064404},
journal = {Physical Review Materials},
number = 6,
volume = 3,
place = {United States},
year = {2019},
month = {6}
}
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