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Phys. Rev. B 72, 060407(R) (2005) [4 pages]

Magnetic phase diagram of the colossal magnetoelectric DyMn2O5

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W. Ratcliff, II1, V. Kiryukhin2, M. Kenzelmann1,3, S.-H. Lee4, R. Erwin1, J. Schefer5, N. Hur2, S. Park2, and S-W. Cheong2
1NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
2Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
3Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218, USA
4Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA
5Laboratory for Neutron Scattering ETHZ and PSI, CH-5232 Villigen PSI, Switzerland

Received 13 April 2005; published 25 August 2005

We report neutron-diffraction measurements of the magnetic phase diagram of the colossal magnetoelectric DyMn2O5. Our measurements reveal the magnetic origin of the complex dielectric anomalies in this material. Frustrated magnetic interactions result in a large density of low-energy magnetic states which can be selected by the application of relatively small magnetic fields. The unusual combination of magnetic frustration and strong magnetoelastic coupling is responsible for the remarkable changes of the dielectric properties of DyMn2O5 in small applied magnetic fields.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.72.060407
DOI:
10.1103/PhysRevB.72.060407
PACS:
75.80.+q, 75.25.+z, 77.80.−e
 
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