2014/08/01 by W. Miiller, Wojciech Miiller, L. S. Wu +23 · 1 citation
Chemistry · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Ising model #Magnetic moment #Neutron diffraction #Physics #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.93.104419
published as Phys. Rev. B 93, 104419 (2016) · 5 pages, 4 figures
arxiv created 2014/08/01 · openalex publication_date 2016/03/22 · openalex created_date 2019/06/27 · arxiv updated 2020/02/24 · openalex updated_date 2026/08/06
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=2.07\phantom\rule0.28em0exK, and the magnetic structure determined from these measurements features the interleaving of two orthogonal sublattices into a 5\ifmmode×\else\texttimes\fi5\ifmmode×\else\texttimes\fi1 magnetic supercell that is based on stripes with moments perpendicular to the dimer bonds, which are along (110) and (\ensuremath-110). Magnetic fields applied along (110) or (\ensuremath-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 \mathrm\ensuremathΔE\ensuremath≃0.07\phantom\rule0.28em0exmeV.