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<div class="csl-entry">Schrettle, F., Krohns, S., Lunkenheimer, P., Hemberger, J., Büttgen, N., Krug von Nidda, H.-A., Prokofiev, A. V., & Loidl, A. (2008). Switching the ferroelectric polarization in the S=1/2 chain cuprate LiCuVO₄ by external magnetic fields. <i>Physical Review B</i>, <i>77</i>(144101). https://doi.org/10.1103/physrevb.77.144101</div>
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dc.identifier.issn
2469-9950
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/170877
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dc.description.abstract
We present a detailed study of the complex dielectric constant and the ferroelectric polarization in multiferroic LiCuVO₄ as function of temperature and external magnetic field. In zero external magnetic field, a spiral spin order with an ab helix and a propagation vector along the crystallographic b direction is established, which induces ferroelectric order with spontaneous polarization parallel to a. The direction of the helix can be reoriented by an external magnetic field and allows switching of the spontaneous polarization. We find a strong dependence of the absolute value of the polarization for different orientations of the spiral plane. Above 7.5 T, LiCuVO₄ reveals collinear spin order and remains paraelectric for all field directions. Thus, this system is ideally suited to check the symmetry relations for spiral magnets as predicted theoretically. The strong coupling of ferroelectric and magnetic order is documented and the complex (H,T) phase diagram is fully explored.
en
dc.language.iso
en
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dc.publisher
AMER PHYSICAL SOC
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dc.relation.ispartof
Physical Review B
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dc.subject
Condensed Matter Physics
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dc.subject
Electronic, Optical and Magnetic Materials
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dc.subject
permittivity
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dc.subject
copper compounds
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dc.subject
dielectric polarisation
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dc.subject
ferroelectric switching
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dc.subject
lithium compounds
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dc.subject
multiferroics
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dc.title
Switching the ferroelectric polarization in the S=1/2 chain cuprate LiCuVO₄ by external magnetic fields