title: Low-magnetic-field control of electric polarization vector in a helimagnet.
abstract: The mutual control of the electric and magnetic properties of a solid is currently of great interest because of the possible application for novel electronic devices. We report on the low-magnetic-field (for example, B values of +/-30 milliteslas) control of the polarization (P) vector in a hexaferrite, Ba2Mg2Fe12O22, which shows the helimagnetic spin structure with the propagation vector k0 parallel to [001]. The B-induced transverse conical spin structure carries the P vector directing perpendicular to both B and k0, in accord with the recently proposed spin-current model. Then, the oscillating or multidirectionally rotating B produces the cyclic displacement current via the flexible handling of the magnetic cone axis.
authors: Multiferroics Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), care of Department of Applied Physics, University of Tokyo, Hongo, Tokyo 113-8656, Japan. ishiwata@riken.jp
authors: Shintaro
authors: S
authors: Ishiwata
authors: Yasujiro
authors: Y
authors: Taguchi
authors: Hiroshi
authors: H
authors: Murakawa
authors: Yoshinori
authors: Y
authors: Onose
authors: Yoshinori
authors: Y
authors: Tokura