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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/12369423
Record Status
Checked
Record Id
12369423
Title
Spin structure and magnetic frustration in multiferroic RMn
2
O
5
(R=Tb,Ho,Dy)
Contributors
GR Blake (CCLRC Rutherford Appleton Lab.)
,
LC Chapon (CCLRC Rutherford Appleton Lab.)
,
PG Radaelli (CCLRC Rutherford Appleton Lab.)
,
S Park
,
N Hur
,
S-W Cheong
,
J Rodriguez-Carvajal
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
,
pultiferroics, magnetic structure
,
physics
,
crystal
Funding Information
Related Research Object(s):
34021
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Preprint
Phys Rev B
2005.
arXiv:cond-mat/0501382
2005
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