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Title: Disorder from order among anisotropic next-nearest-neighbor Ising spin chains in SrHo2O4

In this study, 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.
Authors:
 [1] ;  [2] ;  [2] ;  [1] ;  [1] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7]
  1. The John Hopkins Univ., Baltimore, MD (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Outstation at Institut Laue-Langevin, Grenoble Cedex (France); Institut fur Kristallographie der RWTH Aachen Univ., Aachen (Germany)
  4. Univ. of Tennessee, Knoxville, TN (United States)
  5. National Institute of Standards and Technology, Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
  6. Iowa State Univ., Ames, IA (United States)
  7. The John Hopkins Univ., Baltimore, MD (United States); Oak Ridge National Lab., Oak Ridge, TN (United States); National Institute of Standards and Technology, Gaithersburg, MD (United States)
Publication Date:
OSTI Identifier:
1227213
Report Number(s):
IS-J--8630
Journal ID: ISSN 1098-0121; PRBMDO
Grant/Contract Number:
FG02-08ER46544; AC02-07CH11358; DMR0944772
Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 5; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE