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Article Dans Une Revue Applied Physics Letters Année : 2013

Pressure effect on the magnetic order of LuFe2O4

E. Elkaim
F. Damay
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Résumé

The effects of applied external pressure on the low temperature crystal and magnetic structures of LuFe2O4 have been investigated by means of synchrotron X-ray and neutron diffraction experiments in the range 0-3 GPa. Although the crystal structure is nearly rhombohedral at RT and ambient pressure, a marked monoclinic distortion is seen at low temperature, which increases with increasing pressure. In the magnetically ordered regime, the ordered magnetic moment value at 50K decreases by up to 30% at 3 GPa, although no evidence for magnetic diffuse scattering can be inferred from the data. A tentative explanation is proposed, based on the delocalization of the magnetic moment, and possibly related with a melting of the charge ordered state in this pressure range.
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Dates et versions

hal-00880200 , version 1 (05-11-2013)

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O. L. Makarova, J. Bourgeois, M. Poienar, I. Mirebeau, S. E. Kichanov, et al.. Pressure effect on the magnetic order of LuFe2O4. Applied Physics Letters, 2013, 103 (8), pp.082907. ⟨10.1063/1.4819073⟩. ⟨hal-00880200⟩
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