TY - JOUR
T1 - Electric polarization induced by transverse magnetic field in the anisotropy-controlled conical helimagnet Ba2 (Mg1-x Znx) 2 Fe12 O22
AU - Ishiwata, S.
AU - Taguchi, Y.
AU - Tokunaga, Y.
AU - Murakawa, H.
AU - Onose, Y.
AU - Tokura, Y.
PY - 2009/5/1
Y1 - 2009/5/1
N2 - Microscopic origin of magnetic-field (B) induced electric polarization (P) potentially up to near room temperature has been investigated for helimagnets Ba2 (Mg1-x Znx) 2 Fe12 O22 with controlled magnetic anisotropy by revealing B - and x -dependent changes of magnetoelectric responses. As Zn concentration (x) increases, the B -induced P rapidly diminishes, accompanying the change in the magnetic-easy surface from conical to planar. Possible spin structures are proposed to explain the observed B dependence of P in terms of the spin-current model. The results indicate the important role of magnetic anisotropy in the B -induced ferroelectric state of this class of helimagnets.
AB - Microscopic origin of magnetic-field (B) induced electric polarization (P) potentially up to near room temperature has been investigated for helimagnets Ba2 (Mg1-x Znx) 2 Fe12 O22 with controlled magnetic anisotropy by revealing B - and x -dependent changes of magnetoelectric responses. As Zn concentration (x) increases, the B -induced P rapidly diminishes, accompanying the change in the magnetic-easy surface from conical to planar. Possible spin structures are proposed to explain the observed B dependence of P in terms of the spin-current model. The results indicate the important role of magnetic anisotropy in the B -induced ferroelectric state of this class of helimagnets.
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U2 - 10.1103/PhysRevB.79.180408
DO - 10.1103/PhysRevB.79.180408
M3 - Article
AN - SCOPUS:67049155749
SN - 0163-1829
VL - 79
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 18
M1 - 180408
ER -