Low-magnetic-field control of electric polarization vector in a helimagnet
Low-magnetic-field control of electric polarization vector in a helimagnet
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DOI：
10.1126/science.1154507
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发表时间：
2008-03-21
期刊：
影响因子：
56.9
通讯作者：
Tokura, Yoshinori
中科院分区：
文献类型：
--
作者：
Ishiwata, Shintaro;Taguchi, Yasujiro;Tokura, Yoshinori
固体的电和磁性质的相互控制是目前的极大兴趣，因为新的电子器件的可能的应用。我们报道了低磁场（例如，B值为+/- 30毫特斯拉）对六角铁氧体Ba_2Mg_2Fe_（12）O_（22）中极化（P）矢量的控制，它显示了螺旋磁自旋结构，传播矢量k（0）平行于[ 001]。B诱导的横向锥形自旋结构携带垂直于B和k（0）的P矢量，与最近提出的自旋流模型雅阁。然后，振荡或多向旋转的B通过磁锥轴的灵活处理产生循环位移电流。
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- magneticfield ( 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 k(0) parallel to [ 001]. The B- induced transverse conical spin structure carries the P vector directing perpendicular to both B and k(0), 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.