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Disorder from Order Among Anisotropic Next-Nearest-Neighbor Ising Spin Chains in SrHo2O4



J.-J. Wen, W. Tian, V. O. Garlea, S. M. Koohpayeh, T. M. McQueen, H.-F. Li, J.-Q. Yan, Jose Rodriguez Rivera, D. Vaknin, Collin L. Broholm


We describe why Ising spin chains with competing interactions in SrHo2O4 segregate into ordered and disordered ensembles at low temperatures (T). Using elastic neutron scattering, magnetization, and specific heat measurements, the two distinct spin chains are inferred to have Neel (arrow up, arrow down, arrow up, arrow down) and double Neel (arrow up, arrow up, arrow down, arrow down) ground states, respectively. Below TN = 0.68(2) K, the Neel chains develop three-dimensional long range order (LRO), which arrests further thermal equilibration of the double-Neel chains so they remain in a disordered incommensurate state for T below Ts = 0.52(2) K. SrHo2O4 distills an important feature of incommensurate low dimensional magnetism: kinetically trapped topological defects in a quasi-d-dimensional spin system can preclude order in d + 1 dimensions.
Physical Review B


Neutron Scattering, Magnetic Materials


Wen, J. , Tian, W. , Garlea, V. , Koohpayeh, S. , McQueen, T. , Li, H. , Yan, J. , Rodriguez Rivera, J. , Vaknin, D. and Broholm, C. (2015), Disorder from Order Among Anisotropic Next-Nearest-Neighbor Ising Spin Chains in SrHo<sub>2</sub>O<sub>4</sub>, Physical Review B, [online], (Accessed April 23, 2024)
Created February 25, 2015, Updated October 12, 2021