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Persistent URL http://purl.org/net/epubs/work/34021
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Record Id 34021
Title Spin structure and magnetic frustration in multiferroic RMn2O5 (R=Tb,Ho,Dy)
Abstract We have studied the crystal and magnetic structures of the magnetoelectric materials RMn<sub>2</sub>O<sub>5</sub> (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+</sup> cations and giving rise to a canted antiferroelectric phase.
Organisation CCLRC , ISIS , ISIS-GEM
Keywords ISIS 2005 , physics , multiferroics, magnetic structure , crystal
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Related Research Object(s): 12369423
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Language English (EN)
Type Details URI(s) Local file(s) Year
Journal Article Phys Rev B 71 (2005): 214402, 1-9. doi:10.1103/PhysRevB.71.214402 2005