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Title: Spin structure and magnetic frustration in multiferroic RMn{sub 2}O{sub 5} (R=Tb,Ho,Dy)

Abstract

We have studied the crystal and magnetic structures of the magnetoelectric materials RMn{sub 2}O{sub 5} (R=Tb,Ho,Dy) using neutron diffraction as a function of temperature. All three materials display incommensurate antiferromagnetic ordering below 40 K, becoming commensurate on further cooling. For R=Tb,Ho, a commensurate-incommensurate transition takes place at low temperatures. The commensurate magnetic structures have been solved and are discussed in terms of competing exchange interactions. The spin configuration within the ab plane is essentially the same for each system, and the radius of R determines the sign of the magnetic exchange between adjacent planes. The inherent magnetic frustration in these materials is lifted by a small lattice distortion, primarily involving shifts of the Mn{sup 3+} cations and giving rise to a canted antiferroelectric phase.

Authors:
 [1];  [1];  [1]; ; ;  [2];  [3]
  1. ISIS Facility, Rutherford Appleton Laboratory-CCLRC, Chilton, Didcot, Oxfordshire OX11 0QX (United Kingdom)
  2. Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854 (United States)
  3. Laboratoire Leon Brillouin (CEA-CNRS), CEA/Saclay, 91191 Gif-sur-Yvette Cedex (France)
Publication Date:
OSTI Identifier:
20719033
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 71; Journal Issue: 21; Other Information: DOI: 10.1103/PhysRevB.71.214402; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; ANTIFERROELECTRIC MATERIALS; ANTIFERROMAGNETIC MATERIALS; ANTIFERROMAGNETISM; CATIONS; CRYSTAL STRUCTURE; CRYSTALS; DYSPROSIUM COMPOUNDS; ELECTRONS; EXCHANGE INTERACTIONS; FERROELECTRIC MATERIALS; HOLMIUM COMPOUNDS; MANGANATES; MANGANESE IONS; NEUTRON DIFFRACTION; PHASE TRANSFORMATIONS; SPIN; TEMPERATURE DEPENDENCE; TERBIUM COMPOUNDS

Citation Formats

Blake, G R, Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, Chapon, L C, Radaelli, P G, Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, Park, S, Hur, N, Cheong, S-W, and Rodriguez-Carvajal, J. Spin structure and magnetic frustration in multiferroic RMn{sub 2}O{sub 5} (R=Tb,Ho,Dy). United States: N. p., 2005. Web. doi:10.1103/PhysRevB.71.214402.
Blake, G R, Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, Chapon, L C, Radaelli, P G, Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, Park, S, Hur, N, Cheong, S-W, & Rodriguez-Carvajal, J. Spin structure and magnetic frustration in multiferroic RMn{sub 2}O{sub 5} (R=Tb,Ho,Dy). United States. doi:10.1103/PhysRevB.71.214402.
Blake, G R, Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, Chapon, L C, Radaelli, P G, Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, Park, S, Hur, N, Cheong, S-W, and Rodriguez-Carvajal, J. Wed . "Spin structure and magnetic frustration in multiferroic RMn{sub 2}O{sub 5} (R=Tb,Ho,Dy)". United States. doi:10.1103/PhysRevB.71.214402.
@article{osti_20719033,
title = {Spin structure and magnetic frustration in multiferroic RMn{sub 2}O{sub 5} (R=Tb,Ho,Dy)},
author = {Blake, G R and Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 and Chapon, L C and Radaelli, P G and Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT and Park, S and Hur, N and Cheong, S-W and Rodriguez-Carvajal, J},
abstractNote = {We have studied the crystal and magnetic structures of the magnetoelectric materials RMn{sub 2}O{sub 5} (R=Tb,Ho,Dy) using neutron diffraction as a function of temperature. All three materials display incommensurate antiferromagnetic ordering below 40 K, becoming commensurate on further cooling. For R=Tb,Ho, a commensurate-incommensurate transition takes place at low temperatures. The commensurate magnetic structures have been solved and are discussed in terms of competing exchange interactions. The spin configuration within the ab plane is essentially the same for each system, and the radius of R determines the sign of the magnetic exchange between adjacent planes. The inherent magnetic frustration in these materials is lifted by a small lattice distortion, primarily involving shifts of the Mn{sup 3+} cations and giving rise to a canted antiferroelectric phase.},
doi = {10.1103/PhysRevB.71.214402},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 21,
volume = 71,
place = {United States},
year = {2005},
month = {6}
}