Disorder from order among anisotropic next-nearest-neighbor Ising spin chains in SrHo2 O4

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

doi:10.1103/PhysRevB.91.054424

Disorder from order among anisotropic next-nearest-neighbor Ising spin chains in SrHo2 O4

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

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Abstract

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 Néel (↑↓↑↓) and double-Néel (↑↑↓↓) ground states, respectively. Below TN=0.68(2)K, the Néel chains develop three-dimensional long range order (LRO), which arrests further thermal equilibration of the double-Néel 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.

Original language	English
Article number	054424
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.91.054424
State	Published - Feb 26 2015

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Wen, J. J., Tian, W., Garlea, V. O., Koohpayeh, S. M., McQueen, T. M., Li, H. F., Yan, J. Q., Rodriguez-Rivera, J. A., Vaknin, D., & Broholm, C. L. (2015). Disorder from order among anisotropic next-nearest-neighbor Ising spin chains in SrHo2 O4. Physical Review B - Condensed Matter and Materials Physics, 91(5), Article 054424. https://doi.org/10.1103/PhysRevB.91.054424

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title = "Disorder from order among anisotropic next-nearest-neighbor Ising spin chains in SrHo2 O4",

abstract = "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 N{\'e}el (↑↓↑↓) and double-N{\'e}el (↑↑↓↓) ground states, respectively. Below TN=0.68(2)K, the N{\'e}el chains develop three-dimensional long range order (LRO), which arrests further thermal equilibration of the double-N{\'e}el 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.",

author = "Wen, {J. J.} and W. Tian and Garlea, {V. O.} and Koohpayeh, {S. M.} and McQueen, {T. M.} and Li, {H. F.} and Yan, {J. Q.} and Rodriguez-Rivera, {J. A.} and D. Vaknin and Broholm, {C. L.}",

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AU - Wen, J. J.

AU - Tian, W.

AU - Garlea, V. O.

AU - Koohpayeh, S. M.

AU - McQueen, T. M.

AU - Li, H. F.

AU - Yan, J. Q.

AU - Rodriguez-Rivera, J. A.

AU - Vaknin, D.

AU - Broholm, C. L.

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N2 - 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 Néel (↑↓↑↓) and double-Néel (↑↑↓↓) ground states, respectively. Below TN=0.68(2)K, the Néel chains develop three-dimensional long range order (LRO), which arrests further thermal equilibration of the double-Néel 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.

AB - 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 Néel (↑↓↑↓) and double-Néel (↑↑↓↓) ground states, respectively. Below TN=0.68(2)K, the Néel chains develop three-dimensional long range order (LRO), which arrests further thermal equilibration of the double-Néel 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.

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Disorder from order among anisotropic next-nearest-neighbor Ising spin chains in SrHo2 O4

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