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Title: Spin-ordering and magnetoelastic coupling in the extended kagome system YBaCo4O7

Abstract

Low-temperature magnetic and structural behavior of the extended Kagome system YBaCo4O7 has been studied by single-crystal neutron diffraction and high-resolution powder x-ray diffraction. Long-range magnetic ordering associated with a structural transition from orthorhombic Pbn21 to monoclinic P21 symmetry has been found at T1 ~ 100 K. The interplay between the structural and magnetic degrees of freedom indicates that the degeneracy of the magnetic ground state, present in the orthorhombic phase, is lifted through a strong magnetoelastic coupling, as observed in other frustrated systems. At T2 ~ 60 K, an additional magnetic transition is observed, though isosymmetric. Models for the magnetic structures below T1 and T2 are presented, based on refinements using a large number of independent reflections. Furthermore, the results obtained are compared with previous single-crystal and powder-diffraction studies on this and related compositions.

Authors:
 [1];  [1];  [2];  [3];  [4];  [4];  [1];  [4]
  1. Rutherford Appleton Lab.-CCLRC, Oxfordshire (United Kingdom)
  2. Institut Laue-Langevin, Grenoble Cedex (France)
  3. Stony Brook Univ., Stony Brook, NY (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1143568
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 83; Journal Issue: 21; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Khalyavin, D. D., Manuel, P., Ouladdiaf, B., Stephens, Peter W., Zheng, Hong, Mitchell, John F., Chapon, Laurant C., and Huq, Ashfia. Spin-ordering and magnetoelastic coupling in the extended kagome system YBaCo4O7. United States: N. p., 2011. Web. doi:10.1103/PhysRevB.83.094412.
Khalyavin, D. D., Manuel, P., Ouladdiaf, B., Stephens, Peter W., Zheng, Hong, Mitchell, John F., Chapon, Laurant C., & Huq, Ashfia. Spin-ordering and magnetoelastic coupling in the extended kagome system YBaCo4O7. United States. https://doi.org/10.1103/PhysRevB.83.094412
Khalyavin, D. D., Manuel, P., Ouladdiaf, B., Stephens, Peter W., Zheng, Hong, Mitchell, John F., Chapon, Laurant C., and Huq, Ashfia. 2011. "Spin-ordering and magnetoelastic coupling in the extended kagome system YBaCo4O7". United States. https://doi.org/10.1103/PhysRevB.83.094412.
@article{osti_1143568,
title = {Spin-ordering and magnetoelastic coupling in the extended kagome system YBaCo4O7},
author = {Khalyavin, D. D. and Manuel, P. and Ouladdiaf, B. and Stephens, Peter W. and Zheng, Hong and Mitchell, John F. and Chapon, Laurant C. and Huq, Ashfia},
abstractNote = {Low-temperature magnetic and structural behavior of the extended Kagome system YBaCo4O7 has been studied by single-crystal neutron diffraction and high-resolution powder x-ray diffraction. Long-range magnetic ordering associated with a structural transition from orthorhombic Pbn21 to monoclinic P21 symmetry has been found at T1 ~ 100 K. The interplay between the structural and magnetic degrees of freedom indicates that the degeneracy of the magnetic ground state, present in the orthorhombic phase, is lifted through a strong magnetoelastic coupling, as observed in other frustrated systems. At T2 ~ 60 K, an additional magnetic transition is observed, though isosymmetric. Models for the magnetic structures below T1 and T2 are presented, based on refinements using a large number of independent reflections. Furthermore, the results obtained are compared with previous single-crystal and powder-diffraction studies on this and related compositions.},
doi = {10.1103/PhysRevB.83.094412},
url = {https://www.osti.gov/biblio/1143568}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 21,
volume = 83,
place = {United States},
year = {Tue Mar 15 00:00:00 EDT 2011},
month = {Tue Mar 15 00:00:00 EDT 2011}
}