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Title: Observation of spontaneous ferroelectric polarization reversal in multiferroic Mn{sub 1−x}Ni{sub x}WO{sub 4} (x ≈ 0.16)

In this Letter, we report the effect of replacing Mn{sup 2+} ions with Ni{sup 2+} on the ferroelectricity of multiferroic MnWO{sub 4} single crystals. When the amount of substitution was close to 16%, the sign of ferroelectric polarization spontaneously became negative with respect to initial dc poling field at a few degrees below T{sub C}. Neutron diffraction intensities revealed a sudden change in the underlying spiral spin ordering that occurred coincidentally with the observed sign reversal. This unusual behavior in zero magnetic fields suggests that strong competitions between the two different magnetic ions may provide an efficient route to manipulation of existing multiferroics.
Authors:
;  [1] ; ;  [2] ;  [3]
  1. Department of Physics, Korea University, Seoul 136-713 (Korea, Republic of)
  2. CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747 (Korea, Republic of)
  3. Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)
Publication Date:
OSTI Identifier:
22303865
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 25; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPETITION; FERROELECTRIC MATERIALS; MAGNETIC FIELDS; MANGANESE IONS; MANGANESE TUNGSTATES; MONOCRYSTALS; NEUTRON DIFFRACTION; NICKEL COMPOUNDS; NICKEL IONS; POLARIZATION; SPIN