Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 77, Issue 4, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.77.043709
Keywords
ferroelectricity; helicity; proper screw; magnetoelectric effect; ZnCr2Se4
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Application of magnetic field (H) can produce the ferroelectric polarization (P) in a proper screw helimagnet, ZnCr2Se4. While rotating H, we observed the cyclic generation of polarization current arising from the change of P in the conical spin structure. Versatile variations of P in magnitude and sign are observed while changing the direction and magnitude of H. The behaviors are ascribed to the rotation of the spin cones and the conserving or reversing spin-helicity upon the flop of the screw propagation vector, as affected by the competition among the magnetic anisotropy, inclination of the cone axis to H, and the P domain-wall stability.
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