Magnetic structure of Yb2Pt2Pb: Ising moments on the Shastry-Sutherland lattice

W. Miiller; L. S. Wu; M. S. Kim; T. Orvis; J. W. Simonson; M. Gamza; D. M. McNally; C. S. Nelson; G. Ehlers; A. Podlesnyak; J. S. Helton; Y. Zhao; Y. Qiu; J. R.D. Copley; J. W. Lynn; I. Zaliznyak; M. C. Aronson

doi:10.1103/PhysRevB.93.104419

Magnetic structure of Yb2Pt2Pb: Ising moments on the Shastry-Sutherland lattice

W. Miiller, L. S. Wu, M. S. Kim, T. Orvis, J. W. Simonson, M. Gamza, D. M. McNally, C. S. Nelson, G. Ehlers, A. Podlesnyak, J. S. Helton, Y. Zhao, Y. Qiu, J. R.D. Copley, J. W. Lynn, I. Zaliznyak, M. C. Aronson

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Abstract

Neutron diffraction measurements were carried out on single crystals and powders of Yb2Pt2Pb, where Yb moments form two interpenetrating planar sublattices of orthogonal dimers, a geometry known as Shastry-Sutherland lattice, and are stacked along the c axis in a ladder geometry. Yb2Pt2Pb orders antiferromagnetically at TN=2.07K, and the magnetic structure determined from these measurements features the interleaving of two orthogonal sublattices into a 5×5×1 magnetic supercell that is based on stripes with moments perpendicular to the dimer bonds, which are along (110) and (-110). Magnetic fields applied along (110) or (-110) suppress the antiferromagnetic peaks from an individual sublattice, but leave the orthogonal sublattice unaffected, evidence for the Ising character of the Yb moments in Yb2Pt2Pb that is supported by point charge calculations. Specific heat, magnetic susceptibility, and electrical resistivity measurements concur with neutron elastic scattering results that the longitudinal critical fluctuations are gapped with ΔE≃0.07meV.

Original language	English
Article number	104419
Journal	Physical Review B
Volume	93
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.93.104419
State	Published - Mar 22 2016

Funding

We acknowledge valuable discussions with T. Sakakibara. Work at Stony Brook University (W.M., L.S.W., M.S.K., T.O., J.W.S., D.M., M.C.A.) was supported by NSF-DMR-1310008. Work at BNL (M.G., I.Z., A.M. T.) and use of the NSLS were supported by Office of Basic Energy Sciences (BES), Division of Materials Sciences and Engineering, U.S. Department of Energy (DOE), under Contract No. DE-SC00112704. This work utilized facilities supported in part by the National Science Foundation under Agreement No. DMR-0944772. Research conducted at SNS was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy.

Funders	Funder number
Scientific User Facilities Division
National Science Foundation	DMR-0944772
U.S. Department of Energy	DE-SC00112704
Directorate for Mathematical and Physical Sciences	0944772
Basic Energy Sciences
Brookhaven National Laboratory
Stony Brook University	NSF-DMR-1310008
Division of Materials Sciences and Engineering

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Miiller, W., Wu, L. S., Kim, M. S., Orvis, T., Simonson, J. W., Gamza, M., McNally, D. M., Nelson, C. S., Ehlers, G., Podlesnyak, A., Helton, J. S., Zhao, Y., Qiu, Y., Copley, J. R. D., Lynn, J. W., Zaliznyak, I., & Aronson, M. C. (2016). Magnetic structure of Yb2Pt2Pb: Ising moments on the Shastry-Sutherland lattice. Physical Review B, 93(10), Article 104419. https://doi.org/10.1103/PhysRevB.93.104419

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title = "Magnetic structure of Yb2Pt2Pb: Ising moments on the Shastry-Sutherland lattice",

abstract = "Neutron diffraction measurements were carried out on single crystals and powders of Yb2Pt2Pb, where Yb moments form two interpenetrating planar sublattices of orthogonal dimers, a geometry known as Shastry-Sutherland lattice, and are stacked along the c axis in a ladder geometry. Yb2Pt2Pb orders antiferromagnetically at TN=2.07K, and the magnetic structure determined from these measurements features the interleaving of two orthogonal sublattices into a 5×5×1 magnetic supercell that is based on stripes with moments perpendicular to the dimer bonds, which are along (110) and (-110). Magnetic fields applied along (110) or (-110) suppress the antiferromagnetic peaks from an individual sublattice, but leave the orthogonal sublattice unaffected, evidence for the Ising character of the Yb moments in Yb2Pt2Pb that is supported by point charge calculations. Specific heat, magnetic susceptibility, and electrical resistivity measurements concur with neutron elastic scattering results that the longitudinal critical fluctuations are gapped with ΔE≃0.07meV.",

author = "W. Miiller and Wu, {L. S.} and Kim, {M. S.} and T. Orvis and Simonson, {J. W.} and M. Gamza and McNally, {D. M.} and Nelson, {C. S.} and G. Ehlers and A. Podlesnyak and Helton, {J. S.} and Y. Zhao and Y. Qiu and Copley, {J. R.D.} and Lynn, {J. W.} and I. Zaliznyak and Aronson, {M. C.}",

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AU - Orvis, T.

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AU - Gamza, M.

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AU - Nelson, C. S.

AU - Ehlers, G.

AU - Podlesnyak, A.

AU - Helton, J. S.

AU - Zhao, Y.

AU - Qiu, Y.

AU - Copley, J. R.D.

AU - Lynn, J. W.

AU - Zaliznyak, I.

AU - Aronson, M. C.

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N2 - Neutron diffraction measurements were carried out on single crystals and powders of Yb2Pt2Pb, where Yb moments form two interpenetrating planar sublattices of orthogonal dimers, a geometry known as Shastry-Sutherland lattice, and are stacked along the c axis in a ladder geometry. Yb2Pt2Pb orders antiferromagnetically at TN=2.07K, and the magnetic structure determined from these measurements features the interleaving of two orthogonal sublattices into a 5×5×1 magnetic supercell that is based on stripes with moments perpendicular to the dimer bonds, which are along (110) and (-110). Magnetic fields applied along (110) or (-110) suppress the antiferromagnetic peaks from an individual sublattice, but leave the orthogonal sublattice unaffected, evidence for the Ising character of the Yb moments in Yb2Pt2Pb that is supported by point charge calculations. Specific heat, magnetic susceptibility, and electrical resistivity measurements concur with neutron elastic scattering results that the longitudinal critical fluctuations are gapped with ΔE≃0.07meV.

AB - Neutron diffraction measurements were carried out on single crystals and powders of Yb2Pt2Pb, where Yb moments form two interpenetrating planar sublattices of orthogonal dimers, a geometry known as Shastry-Sutherland lattice, and are stacked along the c axis in a ladder geometry. Yb2Pt2Pb orders antiferromagnetically at TN=2.07K, and the magnetic structure determined from these measurements features the interleaving of two orthogonal sublattices into a 5×5×1 magnetic supercell that is based on stripes with moments perpendicular to the dimer bonds, which are along (110) and (-110). Magnetic fields applied along (110) or (-110) suppress the antiferromagnetic peaks from an individual sublattice, but leave the orthogonal sublattice unaffected, evidence for the Ising character of the Yb moments in Yb2Pt2Pb that is supported by point charge calculations. Specific heat, magnetic susceptibility, and electrical resistivity measurements concur with neutron elastic scattering results that the longitudinal critical fluctuations are gapped with ΔE≃0.07meV.

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Magnetic structure of Yb2Pt2Pb: Ising moments on the Shastry-Sutherland lattice

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