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Title: One Dimensional(1D)-to-2D Crossover of Spin Correlations in the 3D Magnet ZnMn2O4

In this paper we report on the intriguing evolution of the dynamical spin correlations of the frustrated spinel ZnMn2O4. Inelastic neutron scattering and magnetization studies reveal that the dynamical correlations at high temperatures are 1D. At lower temperature, these dynamical correlations become 2D. Surprisingly, the dynamical correlations condense into a quasi 2D Ising-like ordered state, making this a rare observation of two dimensional order on the spinel lattice. Remarkably, 3D ordering is not observed down to temperatures as low as 300 mK. This unprecedented dimensional crossover stems from frustrated exchange couplings due to the huge Jahn-Teller distortions around Mn3+ ions on the spinel lattice.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [4] ;  [2] ;  [1] ;  [5] ;  [1]
  1. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
  2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research; Univ. of Maryland, College Park, MD (United States)
  3. Rutgers Univ., Piscataway, NJ (United States); Korea Atomic Energy Research Inst., Daejeon (Korea)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Rutgers Univ., Piscataway, NJ (United States)
Publication Date:
OSTI Identifier:
1258606
Grant/Contract Number:
FG02-07ER46382; AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS