Robust charge and magnetic order under electric field and current in the multiferroic LuFe(2)O(4)

Abstract

We performed elastic neutron scattering measurements on the charge- and magnetically-ordered multiferroic material LuFe(2)O(4). An external electric field along the [001] direction with strength up to 20 kV/cm applied at low temperature (~100 K) does not affect either the charge or magnetic structure. At higher temperatures (~360 K), before the transition to three-dimensional charge-ordered state, the resistivity of the sample is low, and an electric current was applied instead. A reduction of the charge and magnetic peak intensities occurs when the sample is cooled under a constant electric current. However, after calibrating the real sample temperature using its own resistance-temperature curve, we show that the actual sample temperature is higher than the thermometer readings, and the "intensity reduction" is entirely due to internal sample heating by the applied current. Our results suggest that the charge and magnetic orders in LuFe(2)O(4) are unaffected by the application of external electric field/current, and previously observed electric field/current effects can be naturally explained by internal sample heating.

Version as appeared in PRB.

References in corpus (7)

• Three Dimensional Magnetic Correlations in Multiferroic LuFe2O4
• Charge order in LuFe2O4: antiferroelectric ground state and coupling to magnetism
• Charge-stripe order in the electronic ferroelectric LuFe2O4
• Coupled magnetic and ferroelectric domains in multiferroic Ni3V2O8
• Electrical Control of Magnetization in Charge-ordered Multiferroic LuFe2O4
• Nonlinear current-voltage behavior and electrically driven phase transition in charge frustrated LuFe2O4
• Robust charge stripe order under high electric fields in Nd1.67Sr0.33NiO4

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